Since the systems of birds and the way they process chemicals are completely different than mammals, I will not use anything that is mammal-specific on my birds. I've never wormed my birds, if one were to ever become infested, I would just cull it. I HAVE used antibiotics before, but I doubt I will again---I have one child that is allergic to sulfa antibiotics, and any benefits of chemicals or drugs aren't worth the risk to me anymore.