Call your Representatives and tell them to cosponsor the SAFE Act, H.R. 875.
From The Humane Society:
The last horse slaughter plants in the United States closed years ago, and Congress has consistently voted to prohibit funding for horse slaughter inspections within U.S borders. Unfortunately, this does not prevent the inhumane transport of American equines to other countries. Each year, tens of thousands of our horses and burros are transported under terrible conditions to Canada and Mexico, where they meet a cruel end because there is no federal law stopping such transport across our borders.
The Safeguard American Food Exports (SAFE) Act, introduced today by Reps. Jan Schakowsky, D-Ill., and Vern Buchanan, R-Fla., would change all that. Their measure proposes to end the transport of American horses, burros and other equines abroad to be slaughtered for human consumption, and it would also ensure that horse slaughter plants on U.S. soil remain shuttered.