1 Ironically, it's the frou-frou brands intended to guilt you into thinking that you don't love your animal companion enough if you don't spend 2-3-times as much on their food, that are affected-- Eukanuba, Iams, Science Diet, Authority. Guess it pays to stick with Purina products (who used to test their feedstock when I last heard.) This whole thing took WAY too long to diagnose! Anybody got a chemist on their staff and a gas chromatograph? They could have gotten an answer from CSI in a couple of hours. The suspected poison, aminopterin (4-aminopteroic acid), was the RU-486 of the 50s. Until I could get to my vet, I'd give my cat an activated carbon capsule(sans capsule), folic acid(30mg) and sorbitol to start waste elimination. From what I've been told, vets are trying the "do-nothing" approach. Good luck with that. And food processors? (Human and pet) How about testing all components BEFORE they get into the mix? Hmmm? No matter where you get the feedstock. Are you aware we are at war? Spend a few thousand bucks and let us all sleep soundly.