My huge Jersey Giant Harvey seems to be dying. I see him eating some and drinking but he "falls asleep" just standing and ends up lying down. I go up to him and "wake him up" and he jumps up and acts relatively normal for a few minutes. He jumps on a hen, (I can hardly understand this urge to procreate) eats a bit, drinks some water and 5 minutes later he's asleep on his feet again. I can't find any thing wrong, he is breathing normally, he can eat (but he is not eating much) drinking water too. He is 17 months old and had trouble when young because he grew so fast. At one point he couldn't walk. I gave him vitamins and he was restored. I notice that he is going into the coop during the day and this is not normal for him. I think he is dying. Any thoughts? These photos were all taken today!