Wow! I never heard of EPM before. I did a quick search and it said other hosts of this parasite, Sarcocystis neurona, include Armadillos, Skunks, and Domestic Cats. If I lived somewhere I could legally shoot, I'd kill every cat I saw. This is just one more good reason to exterminate those vermin. The last time I checked, there was no closed season, and no bag limit, for feral cats in Michigan, and I have a license to kill. Cats are all feral if they're outdoors. I like skunks and was glad to have them eating all the June bug grubs in my back yard, but if I had horses, I'd get rid of the skunks too. If my lawn filled up with "cocktail shrimp" because no skunks were eating them, I'd have to start using pesticide, but that's better than having horses die from EPM.