My, rooster was fine yesterday when I put them to bed. Today I noticed him all humped up and not his normal self. He is eating and drinking, but he is acting slow and has lots of poo on his butt its not dry it was watery and clumps. He was not like this yesterday I cleaned off the poo and fed him and gave him fresh clean water. He ate and drank...I have never had a chicken to act this way nor have any that are sick or have brought in any new chickens. What is wrong with him and what can I do?