Among the major animal proteins, beef has the highest share (18.5 percent) of production that moves into international trade. This is likely due to the fact that there are few beef producing countries with an exportable surplus. Dairy is second at 17.8 percent exported, poultry third at around 12 percent and pork is fourth with 10 percent of its production moving into global commerce.   However, the change in trade share over time is quite different. Global poultry exports have been relatively flat, likely because governments seek to protect their producers of this low-cost product. Dairy exports have not done much better, growing at an annualized rate of a half percent over the past decade. Instead, the fastest growth has been i...