I have 13 silkie bantam chicks and they are 1 week old. I noticed that one of them had a hard poop stuck to it's butt. When I removed it I noticed its butt had bright red blood. I had read about Coccidiosis and I don't know if it could be that. I don't know what to do, or give it or what could it even be. I have not seen any more signs of it and it's been two hours. I immediately separated the chick and replaced the other chicks food and water and brooder. I gave them medicated starter feed, with grit. What do I give him is this curable? What could it be?