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Acquisitions Acquisitions (Tables)
 3 Months Ended
Mar. 31, 2013
Business Acquisition [Line Items]  
Business Acquisition Summary Of Acquired Properties [Table Text Block]
The table below reflects the activity related to the acquisitions and dispositions of our animal hospitals and laboratories during the three months ended March 31, 2013 and 2012, respectively:

 
Three Months Ended
March 31,
Animal Hospitals:
2013
 
2012
Animal Hospital acquisitions, excluding Associate Veterinary Clinics (1981) LTD ("AVC")
3

 
9

Acquisitions, merged
—

 
(2
)
AVC acquisition
—

 
44

Sold, closed or merged
(8
)
 
(3
)
Total
(5
)
 
48

 
 
 
 
Laboratories:
 
 
 
Acquisition
1

 
—