The U.S. towers above other countries in the pet food market. The UK comes a distant second when it comes to a worldwide country comparison of industry revenue. This comes as no surprise when you consider that most of the leading pet food companies worldwide are based in the United States. When it comes to future market development, however, Asia Pacific is the region expected to grow the most by 2022, with a forecast growth rate of 9.3 percent. In comparison, the North American market is expected to grow by just 2.3 percent in the same time period.