I have three RIR's that I purchased and have just realized are emaciated. I have no idea whether it's from worms or from improper feeding. I do know that they were in very tight quarters before I got them. I went to the feed store to get advice (and wrote on here as well) I want to treat them for worms just in case but the feed store guy said that they are too thin and to fatten them up with food, and that worming them could kill them because they are so weak. Is that true? he gave me purina crumbles. I was using the medicated chick stuff first. I don't 100% trust his judgment because he proceeded to tell me I could go to jail for animal cruelty....idiot I told him I had just bought them within a few days. Any advice? should I worm them?