I'm not aware that I've eaten horse, but I may have. I have knowingly eaten buffalo, bison, whitetail deer, moose, reindeer, rabbit, squirrel, chicken, cow, pig, various fishes, octopus, shrimp and other crustacians, whale (long ago!), kangaroo, elk (I have elk steaks in the freezer right now), turtle, alligator, and rattlesnake. I know people who have eaten bear, musk ox, seal, maggots, rat, beaver, dog, and moutain lion.

Given the necessity, I'd eat horsemeat. Given the necessity, I'd eat long pig.