Its so nice that the sick horse industry has lots of Mexicans to feed. When I was in Mexico more than a decade ago, nothing was safe to eat. Even bottled drinks until we knew where they came from. One of my travel companions ended up in the hospital most likely from a carton of fruit drink from concentrate. Another got a digestive tract critter that never went away completely.
So, horse meat or not, I think I’ll pass on shithole countries just to save a few bucks.
30 years ago my brother in-law got sick on a Mexican vacation. He was bathroom bound for three weeks and refuses to even speak about that trip