Exhibit 3.7

BY-LAWS

of

Rabbit Hill Holdings, Inc.

ARTICLE I - OFFICES

1. The registered office of the corporation in the State of Delaware is c/o The Corporation Trust Center, 1209 Orange Street, Wilmington, New Castle County, Delaware 19801.

2. The corporation may also have offices at such other places, within or without the State of Delaware, as the Board of Directors may from time to time appoint or the business of the corporation may require.

ARTICLE II - SEAL

The corporate seal shall have inscribed thereon the name of the corporation, the year of its organization, and the words “Corporate Seal, Delaware”.

ARTICLE III - SHAREHOLDERS’ MEETING

1. Meetings of the shareholders shall be held at such place or places, either within or without the State of Delaware as may from time to time be selected.

2. The annual meeting of the shareholders shall be held on a date and at a time as may be fixed by the Board of Directors. At such annual meeting the shareholders shall elect a Board of Directors and transact such other business as may properly be brought before the meeting. If the annual meeting shall not be called and held during any fiscal year, any shareholder may call such meeting at any time thereafter.

3. The presence, in person or by proxy, of shareholders entitled to cast at least a majority of the votes which all shareholders are entitled to cast on the particular matter shall constitute a quorum for the purpose of considering such matter, and, unless otherwise provided by statute, the acts, at a duly organized meeting, of the shareholders present, in person or by proxy, entitled to cast at least a majority of the votes which all shareholders present are entitled to cast shall be the acts of the shareholders. The shareholders present at a duly organized meeting can continue to do business until adjournment, notwithstanding the withdrawal of enough shareholders to leave less than a quorum. Adjournment or adjournments of any annual or special meeting may be taken, but any meeting at which directors are to be elected shall be adjourned only from day to day, or for such longer periods not exceeding fifteen days each, as may be directed by shareholders who are present in person or by proxy and who are entitled to cast at least a majority of the votes which all such shareholders would be entitled to cast at an election of directors until such directors have been elected. If a meeting cannot be organized because a quorum has not attended, those present may, except as otherwise provided by statute, adjourn the meeting to such time and place as they may determine, but in the case of any meeting called for the election of directors, those who attend the second of such adjourned meetings, although less than a quorum, shall nevertheless constitute a quorum for the purpose of electing directors.

4. Every shareholder entitled to vote at a meeting of shareholders, or to express consent or dissent to corporate action in writing without a meeting, may authorize another person or persons to act for him by proxy. Every proxy shall be executed in writing by the shareholders, or by his duly authorized attorney in fact, and filed with the Secretary of the corporation. A proxy, unless coupled with an interest, shall be revocable at will, notwithstanding any other agreement or any provision in the proxy to the contrary, but the revocation of a proxy shall not be effective until notice thereof has been given to the Secretary of the corporation. No unrevoked proxy shall be valid after eleven months from the date of its execution, unless a longer time is expressly provided therein, but in no event shall a proxy, unless coupled with an interest, be voted on after three years from the date of its execution. A proxy shall not be revoked by the death or incapacity of the maker unless before the vote is counted or the authority is exercised, written notice of such death or incapacity is given to the Secretary of the corporation. A shareholder shall not sell his vote or execute a proxy to any person for any sum of money or anything of value. A proxy coupled with an interest shall include an unrevoked proxy in favor of a creditor of a shareholder and such proxy shall be valid so long as the debt owed by him to the creditor remains unpaid. Elections for directors need not be by ballot, except upon demand made by a shareholder at the election and before the voting begins. No share shall be voted at any meeting upon which any installment is due and unpaid.

5. Written notice of the annual meeting shall be given to each shareholder entitled to vote thereat, at least five days prior to the meeting.

6. In advance of any meeting of shareholders, the Board of Directors may appoint judges of election, who need not be shareholders, to act at such meeting or any adjournment thereof. If judges of election be not so appointed, the chairman of any such meeting may, and on the request of any shareholder or his proxy shall, make such appointment at the meeting. The number of judges shall be one or three. If appointed at a meeting on the request of one or more shareholders or proxies, the majority of shares present and entitled to vote shall determine whether one or three judges are to be appointed. On request of the chairman of the meeting, or of any shareholder or his proxy, the judges shall make a report in writing of any challenge or question or matter determined by them, and execute a certificate of any fact found by them. No person who is a candidate for office shall act as a judge.

7. Special meetings of the shareholders may be called at any time by the President, or the Board of Directors, or shareholders entitled to cast at least one-fifth of the votes which all shareholders are entitled to cast at the particular meeting. At any time, upon written request of any person or persons who have duly called a special meeting, it shall be the duty of the Secretary to fix the date of the meeting, to be held not more than sixty days after the receipt of the request, and to give due notice thereof. If the Secretary shall neglect or refuse to fix the date of the meeting and give notice thereof, the person or persons calling the meeting may do so.

8. Business transacted at all special meetings shall be confined to the objects stated in the call and matters germane thereto, unless all shareholders entitled to vote are present and consent.

9. Written notice of a special meeting of shareholders stating the time and place and object thereof, shall be given to each shareholder entitled to vote thereat at least five days before such meeting, unless a greater period of notice is required by statute in a particular case.

10. The officer or agent having charge of the transfer books shall make at least five days before each meeting of shareholders, a complete list of the shareholders entitled to vote at the meeting, arranged in alphabetical order, with the address of and the number of shares held by each, which list shall be subject to inspection by any shareholder at any time during usual business hours. Such list shall also be produced and kept open at the time and place of the meeting, and shall be subject to the inspection of any shareholder during the whole time of the meeting. The original share ledger or transfer book, or a duplicate thereof, shall be prima facie evidence as to who are the shareholders entitled to examine such list or share ledger or transfer book, or to vote in person or by proxy, at any meeting of shareholders.

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ARTICLE IV - DIRECTORS

1. The business of this corporation shall be managed by its Board of Directors. The Board shall initially consist of one (1) member. Upon the first election of Directors by the Shareholders, the Board shall consist of six (6) members. No Director need be a resident of the State of Delaware and no Director shall be required to be a shareholder in the corporation. Each Director shall be elected by the shareholders, at the annual meeting of shareholders of the corporation, and each director shall be elected for the term of one year, and until his or her successor shall be elected and shall qualify.

2. In addition to the powers and authorities by these By-Laws expressly conferred upon them, the Board may exercise all such powers of the corporation and do all such lawful acts and things as are not by statute or by the Certificate of Incorporation or by these By-Laws directed or required to be exercised or done by the shareholders.

3. The meetings of the Board of Directors may be held at such place within or without the State of Delaware, as a majority of the directors may from time to time appoint, or as may be designated in the notice calling the meeting.

4. Each newly elected Board may meet at such place and time as may be fixed by the shareholders at the meeting at which such directors are elected and no notice shall be necessary to the newly elected directors in order legally to constitute the meeting, or they may meet at such place and time as may be fixed by the consent in writing of all the directors.

5. Regular meetings of the Board may be held at such place as shall be determined by the Board, at least quarterly, on a schedule as determined by the Board.

6. Special meetings of the Board may be called by the Chairman of the Board on two days notice to each director, either personally or by mail or by telegram; special meetings shall be called by the President or Secretary in like manner and on like notice on the written request of a majority of the directors in office.

7. A majority of the directors in office shall be necessary to constitute a quorum for the transaction of business, and the acts of a majority of the directors present at a meeting at which a quorum is present shall be the acts of the Board of Directors. Any action which may be taken at a meeting of the directors may be taken without a meeting if a consent or consents in writing, setting forth the action so taken, shall be signed by all of the directors and shall be filed with the Secretary of the corporation.

8. Directors as such, shall not receive any stated salary for their services, but by resolution of the Board, a fixed sum and expenses of attendance, if any, may be allowed for attendance at each regular or special meeting of the Board PROVIDED, that nothing herein contained shall be construed to preclude any director from serving the corporation in any other capacity and receiving compensation therefor.

ARTICLE V - OFFICERS

1. The executive officers of the corporation shall be chosen by the directors and shall be a President, Secretary, and Treasurer. The Board of Directors may also choose one or more Vice Presidents and such other officers and agents as it shall deem necessary, who shall hold their offices for such terms and shall have such authority and shall perform such duties as from time to time shall be prescribed by the Board. Any number of offices may be held by the same person. It shall not be necessary for the officers to be directors.

2. The salaries of all officers and agents of the corporation shall be fixed by the Board of Directors.

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3. The officers of the corporation shall hold office for one year and until their successors are chosen and have qualified. Any officer or agent elected or appointed by the Board of Directors may be removed by the Board of Directors whenever in its judgment the best interests of the corporation will be served thereby.

4. The President shall be the chief executive officer of the corporation. He shall preside at all meetings of the Shareholders and of the Board of Directors. He shall be responsible for the general and active management of the business of the corporation; shall see that all orders and resolutions of the Board of Directors are carried into effect; may execute all corporate contracts and agreements, provided that the Board of Directors may designate additional officers who are also so authorized. He shall execute bonds, mortgages and other contracts requiring a seal, under the seal of the corporation, and the seal when so affixed shall be attested by the signature of the Secretary, unless the Board of Directors otherwise directs.

He shall have general supervision and direction of all the other officers and employees of the corporation and shall see that their duties are properly performed; and shall all have the general power and duties of supervision and management usually vested in the office of President of a corporation. He shall render any and all reports as may be requested by the Board of Directors.

5. Unless otherwise determined by the Board of Directors, the Secretary shall attend all sessions of the Board and all meetings of the shareholders and act as clerk thereof, and record all the votes of the corporation and the minutes of all its transactions in a book to be kept for the purpose; and may perform like duties for all committees of the Board of Directors when required. He shall give, or cause to be given, notice of all meetings of the shareholders and of the Board of Directors, and shall perform such duties as may be prescribed by the Board of Directors or President, and under whose supervision he shall be. He shall keep in safe custody the corporate seal of the corporation, and when authorized by the Board, affix the same to any instrument requiring it.

6. Unless otherwise determined by the Board of Directors, the Treasurer shall have custody of the corporate funds and securities and shall keep full and accurate accounts of receipts and disbursements in books belonging to the corporation, and shall keep the moneys of the corporation in a separate account to the credit of the corporation. He shall disburse the funds of the corporation as may be ordered by the Board, taking proper vouchers for such disbursements, and shall render to the President and directors, at the regular meetings of the Board, or whenever they may require it, an account of all his transactions as Treasurer and of the financial condition of the corporation.

ARTICLE VI - VACANCIES

1. If the office of any officer or agent, one or more, becomes vacant for any reason, the Board of Directors may choose a successor or successors, who shall hold office for the unexpired term in respect of which such vacancy occurred.

2. Vacancies in the Board of Directors, including vacancies resulting from an increase in the number of directors, shall be filled by a majority of the remaining members of the Board though less than a quorum, and each person so elected shall be a director until his successor is elected by the shareholders, who may make such election at the next annual meeting of the shareholders or at any special meeting duly called for that purpose and held prior thereto.

ARTICLE VII - CORPORATE RECORDS

1. There shall be kept at the registered office or principal place of business of the corporation an original or duplicate record of the proceedings of the shareholders and of the directors, and the original or a copy of its

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By-Laws, including all amendments or alterations thereto to date, certified by the Secretary of the corporation. An original or duplicate share register may also be kept at the registered office or principal place of business or at the office of a transfer agent or registrar, giving the names of the shareholders, their respective addresses and the number and classes of shares held by each.

2. Every shareholder shall, upon written demand under oath stating the purpose thereof, have a right to examine, in person or by agent or attorney, during the usual hours for business for any proper purpose, the share register, books or records of account, and records of the proceedings of the shareholders and directors, and make copies or extracts therefrom. A proper purpose shall mean a purpose reasonably related to such person’s interest as a shareholder. In every instance where an attorney or other agent shall be the person who seeks the right to inspection, the demand under oath shall be accompanied by a power of attorney or such other writing which authorizes the attorney or other agent to so act on behalf of the shareholder. The demand under oath shall be directed to the corporation at its principal place of business or at its registered office in the State of Delaware.

ARTICLE VIII - SHARE CERTIFICATES, DIVIDENDS, ETC.

1. The share certificates of the corporation shall be numbered and registered in the share ledger and transfer books of the corporation, as they are issued. They shall be signed by the Chairman of the Board or President and the Secretary or Treasurer and shall bear the corporate seal.

2. Transfers of shares shall be made on the books of the corporation upon surrender of the certificates therefor, endorsed by the person named in the certificate or by attorney, lawfully constituted in writing. No transfer shall be made which is inconsistent with law.

3. The Board of Directors may fix a time, not more than fifty days nor less than ten prior to the date of any meeting of shareholders, or the date fixed for the payment of any dividend or distribution, or the date for the allotment of rights, or the date when any change or conversion or exchange of shares will be made or go into effect, as a record date for the determination of the shareholders entitled to notice of, or to vote at, any such meeting, or entitled to receive payment of any such dividend or distribution, or to receive any such allotment of rights, or to exercise the rights in respect to any such change, conversion, or exchange of shares. In such case, only such shareholders as shall be shareholders of record on the date so fixed shall be entitled to notice of, or to vote at, such meeting or to receive payment of such dividend, or to receive such allotment of rights, or to exercise such rights, as the case may be, notwithstanding any transfer of any shares on the books of the corporation after any record date fixed as aforesaid. The Board of Directors may close the books of the corporation against transfers of shares during the whole or any part of such period, and in such case, written or printed notice thereof shall be mailed at least ten days before the closing thereof to each shareholder of record at the address appearing on the records of the corporation or supplied by him to the corporation for the purpose of notice. While the stock transfer books of the corporation are closed, no transfer of shares shall be made thereon. If no record date is fixed for the determination of shareholders entitled to receive notice of, or vote at, a shareholders’ meeting, transferees of shares which are transferred on the books of the corporation within the ten days next preceding the date of such meeting shall not be entitled to notice of or to vote at such meeting.

4. In the event that a share certificate shall be lost, destroyed or mutilated, a new certificate may be issued therefor upon such terms and indemnity to the corporation as the Board of Directors may prescribe.

5. The Board of Directors may declare and pay dividends upon the outstanding shares of the corporation, from time to time and to such extent as they deem advisable, in the manner and upon the terms and conditions provided by statute and the Certificate of Incorporation. No dividend shall be declared or paid which shall impair the capital of the corporation nor shall any distribution of assets be made to any stockholder unless the value of the assets of the corporation remaining after such payment or distribution is at least equal to the aggregate of its debts and liabilities, including capital.

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6. Before payment of any dividend there may be set aside out of the net profits of the corporation such sum or sums as the directors, from time to time, in their absolute discretion, think proper as a reserve fund to meet contingencies, or for equalizing dividends, or for repairing or maintaining any property of the corporation, or for such other purpose as the directors shall think conducive to the interests of the corporation, and the directors may abolish any such reserve in the manner in which it was created.

ARTICLE IX - MISCELLANEOUS PROVISIONS

1. All checks or demand for money and notes of the corporation shall be signed by such officer or officers or agent or agents as the Board of Directors may from time to time designate.

2. The fiscal year shall begin on January 1 each year.

3. Whenever written notice is required to be given to any person, it may be given to such person, either personally or by sending a copy thereof through the mail, or by telegram, charges prepaid, to his address appearing on the books of the corporation, or supplied by him to the corporation for the purpose of notice. If the notice is sent by mail or by telegraph, it shall be deemed to have been given to the person entitled thereto when deposited in the United States mail or with a telegraph office for transmission to such person. Such notice shall specify the place, day and hour of the meeting and, in the case of a special meeting of shareholders, the general nature of the business to be transacted.

4. Whenever any written notice is required by statute, or by the Certificate of Incorporation or By-Laws of this corporation, a waiver thereof in writing, signed by the person or persons entitled to such notice, whether before or after the time stated therein, shall be deemed equivalent to the giving of such notice. Except in the case of a special meeting of shareholders, neither the business to be transacted at nor the purpose of the meeting need be specified in the waiver of notice of such meeting. Attendance of a person, either in person or by proxy, at any meeting shall constitute a waiver of notice of such meeting, except where a person attends a meeting for the express purpose of objecting to the transaction of any business because the meeting was not lawfully called or convened.

5. One or more directors or shareholders may participate in a meeting of the Board, of a committee of the Board or of the shareholders, by means of conference telephone or similar communications equipment by means of which all persons participating in the meeting can hear each other.

6. Except as otherwise provided in the Certificate of Incorporation or By-Laws of this corporation, any action which may be taken at a meeting of the shareholders or directors or of a class of shareholders may be taken without a meeting, if a consent or consents in writing, setting forth the action so taken, shall be signed by all of the shareholders or directors who would be entitled to vote at a meeting for such purpose and shall be filed with the Secretary of the corporation.

7. Any payments made to an officer or employee of the corporation such as a salary, commission, bonus, interest, rent, travel or entertainment expense incurred by him, which shall be disallowed in whole or in part as a deductible expense by the Internal Revenue Service, shall be reimbursed by such officer or employee to the corporation to the full extent of such disallowance. It shall be the duty of the directors, as a Board, to enforce payment of each such amount disallowed. In lieu of payment by the officer or employee, subject to the determination of the directors, proportionate amounts may be withheld from his future compensation payments until the amount owed to the corporation has been recovered.

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ARTICLE X - INDEMNIFICATION

1. Each person who was or is made a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (hereinafter a “proceeding”), by reason of the fact that he or she is or was a director, officer, or employee of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust or other enterprise, including service with respect to employee benefit plans (hereinafter an “indemnitee”), shall be indemnified and held harmless by the corporation to the fullest extent authorized by the Delaware General Corporation Law, as the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the corporation to provide broader indemnification rights than such law permitted the corporation to provide prior to such amendment), against all expense (including attorneys’ fees, judgments, fines and amounts paid in settlement) actually and reasonably incurred or suffered by such indemnitee and such indemnification shall continue as to an indemnitee who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the indemnitee’s heirs, executors and administrators; provided, however, that, except as provided in paragraph (b) hereof with respect to proceedings to enforce rights to indemnification, the corporation shall indemnify any such indemnitee in connection with a proceeding (or part thereof) initiated by such indemnitee only if such proceeding (or part thereof) was authorized by the Board of Directors of the corporation. The right to indemnification conferred in this Section shall be a contract right and shall include the right to be paid by the corporation the expenses incurred in defending any such proceeding in advance of its final disposition (hereinafter an “advancement of expenses”); provided, however, that, if the Delaware General Corporation Law requires, an advancement of expenses incurred by an indemnitee shall be made only upon delivery to the corporation of an undertaking, by or on behalf of such indemnitee, to repay all amounts so advanced if it shall ultimately be determined by final judicial decision from which there is no further right to appeal that such indemnitee is not entitled to be indemnified for such expenses under this Section or otherwise (hereinafter an “undertaking”).

2. If a claim under Section 1 of this Article is not paid in full by the corporation within sixty days after a written claim has been received by the corporation, except in the case of a claim for an advancement of expenses, in which case the applicable period shall be twenty days, the indemnitee may at any time thereafter bring suit against the corporation to recover the unpaid amount of the claim. If successful in whole or in part in any such suit or in a suit brought by the corporation to recover an advancement of expenses pursuant to the terms of an undertaking, the indemnitee shall be entitled to be paid also the expense of prosecuting or defending such suit. In (i) any suit brought by the indemnitee to enforce a right to indemnification hereunder (but not in a suit brought by the indemnitee to enforce a right to an advancement of expenses) it shall be a defense that, and (ii) any suit by the corporation to recover an advancement of expenses pursuant to the terms of an undertaking, the corporation shall be entitled to recover such expenses upon a final adjudication that, the indemnitee has not met the applicable standard of conduct set forth in the Delaware General Corporation Law. Neither the failure of the corporation (including its Board of Directors, independent legal counsel, or its stockholders) to have made a determination prior to the commencement of such suit that indemnification of the indemnitee is proper in the circumstances because the indemnitee has met the applicable standard of conduct set forth in the Delaware General Corporation Law, nor an actual determination by the corporation (including its Board of Directors, independent legal counsel, or its stockholders) that the indemnitee has not met such applicable standard of conduct or, in the case of such a suit brought by the indemnitee, be a defense to such suit. In any suit brought by the indemnitee to enforce a right hereunder, or by the corporation to recover an advancement of expenses pursuant to the terms of an undertaking, the burden or proving that the indemnitee is not entitled to be indemnified or to such advancement of expenses under this Article or otherwise shall be on the corporation.

3. The rights to indemnification and to the advancement of expenses conferred in this Article shall not be exclusive of any other right which any person may have or hereafter acquire under any statute, the Certificate of Incorporation, these by-laws, agreement, vote of stockholders or disinterested directors or otherwise.

4. The corporation may maintain insurance, at its expense, to protect itself and any director, officer, employee or agent of the corporation or another corporation, partnership, joint venture, trust or other enterprise against any

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expense, liability or loss, whether or not the corporation would have the power to indemnify such person against such expense, liability or loss under the Delaware General Corporation Law.

5. The corporation may, to the extent authorized from time to time by the Board of Directors, grant rights to indemnification and to the advancement of expenses, to any agent of the corporation to the full extent of the provisions of this Article with respect to the indemnification and advancement of expenses of directors, officers and employees of the corporation.

ARTICLE XI - ANNUAL STATEMENT

The Chairman of the Board and Board of Directors shall present at each annual meeting a full and complete statement of the business and affairs of the corporation for the preceding year. Such statement shall be prepared and presented in whatever manner the Board of Directors shall deem advisable and need not be verified by a certified public accountant.

ARTICLE XII - AMENDMENTS

These By-Laws may be amended at any regular or special meeting of the Board of Directors by the vote of a majority of all the directors in office or at any annual or special meeting of shareholders by the vote of the holders of a majority of the outstanding stock entitled to vote. Notice of any such meeting of directors or shareholders shall set forth the proposed change or a summary thereof.

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