I have a rooster that all of a sudden is not able to fly up to his roost, he stays on the bottom perch. He doesn’t really have the strength to run around, he’s good on his legs but if the other chickens bump into him he’ll fall down & it’ll take him awhile to get back up. He’ll just lay on his chest and try to use his beak or wings to push himself up. He kind of has a weird hop to him when he tries running. His comb is shriveled and more pale, so is his throat area. He has no problems eating or drinking, he just seems weaker then normal or just doesn’t seem to have the energy he used to anymore. Does anyone have any idea what I’m dealing with? Other then him not being able to flap his wings and fly around he seems to be doing normal. I am concerned with the paleness to his face but I don’t know what to do for him or whats the cause.