i have a chick that is the number one breed . the one that starts with an O. Anyway it got fat and big real quick and it has a certain odar to it. also the other chicks were pickn on its back and now it has two sores. we also noticed all the fuzz and feathers were gone from its belly. We thaught maybe we fed it to much cause its fat. like way bigger than the rest of the chicks. Please help.