The market for pet care products in the United States is quite large and according to one study, by the firm Packaged Facts, pet food represented only 33.6% of that overall market in 2008, down from 35.1% of the market in 2004. The market sizes presented here are not retail sales figures. They are figures based on the value of manufacturers shipments, thus closer to wholesale prices.

Geographic reference: United States
Year: 2007 and 2008
Market size: $13.5 billion and $15.9 billion respectively
Source: Annual Survey of Manufactures 2008, March 30, 2010, available online here.
Original source: U.S. Bureau of the Census