http://americanpetproduc...press_industrytrends.asp

1/3 of the American population is a dog or a cat

Total Number of Pets Owned in the U.S. (millions) 

Bird 16.2
Cat 86.4
Dog 78.2 
Equine 7.9
Freshwater Fish 151.1
Saltwater Fish 8.61
Reptile 13.0
Small Animal 16.0

America spends more than ever on pets

Total U.S. Pet Industry Expenditures
Year  Billion 
2012 $52.87 Estimate
2011 $50.96 Actual
2010 $48.35
2009 $45.5 
2008 $43.2
2007 $41.2 
2006 $38.5  
2005 $36.3 
2004 $34.4 
2003 $32.4 
2002 $29.5 
2001 $28.5 
1998 $23 
1996 $21 
1994 $17

For 2012, it estimated that $52.87 billion will be spent on our pets in the U.S.
Estimated Breakdown:

Food $20.46 billion  
Supplies/OTC Medicine $12.56 billion 
Vet Care $13.59 billion 
Live animal purchases $2.15 billion 
Pet Services: grooming & boarding $4.11 billion