These four chicks are twelve weeks old. As you can see there is one that is definitely smaller than the rest and has hardly any feathers. It eats fine, drinks fine, and poops fine but I noticed today that it's belly is swollen and seems bruised or black colored. I am not sure what to do with it. I have moved the bigger chicks to the grow out pen, and this one is now alone so I can give it vitamins and special care, also because it needs a heat lamp at night. These four did have coccidiosis when they were young but they came through it just fine after being treated with Corid. Do you think the Cocci stunted this one's growth? Will it ever catch up? I feel so sorry for it. It cries all the time like a new baby chick.