My 7 1/2 week old chicks have been on medicated started since they hatched. They went through a 5lb bag of MannaPro, then I switched to Purina. They had one outing last week, and at least one of them ate a worm. Three days ago I noticed lots of bloody poops, with I though was shed intestinal lining. Since then, the piles have gotten larger and more frequent, and I'm starting to think it's not normal. There is one chick in particular that is making several of them himself. He is social, eats and drinks, but not as interactive as the rest. He has also been closing his eyes a bit, and today I saw him drop his wings (but it's been hot and humid here). They all have been less active, which I thought was due to a heat wave, but they also appear a little puffy. So, would it be wise to treat everyone with Corid? If by chance this isn't cocci, will the Corid have an adverse effect? Please let me know what you think. I've never medicated my birds before. Thank you for your help!