For the past week, George the rooster has been having a hard time jumping into his coop and on to his roost. He also has a pale comb. He is also getting tired easily and has stopped crowing. I thought it might be an injury, but when I pick him up, he is able to move both legs and he doesn't have any sore spots. He is eating and drinking normally and his poop looks normal. He is housed with a "sister" hen and she is perfectly healthy. Does anyone have any ideas? He is approx. 8 mo old. Thanks for any suggestions.