hello, I have a Brahma rooster who just this morning I opened the door to one of my chickens houses and he rolled out on his back. At first I just thought that he was just sleeping resting up against the door and fell over when I opened it until I saw that at the base of his comb it was all bloody, nothing too bad just something that looked like it could have just been from fighting with the other roosters. I only started becoming very concerned when he let me approach and pick him up to inspect the wound on this head. (My chickens tend to be quite skiddish) I noticed he was acting different than his usual self so I set him down and that’s when things took a turn for the worse. He couldn’t walk or even stand at all. He would sometimes try to but never could. I immediately put him in quarintine just in case but he’s eating and drinking just fine. I’m very concerned/scared because this isn’t the first time this has happened. But it only happens to my Brahmas which I find strange. I should also include that he is not fully grown. The one Brahma hen actually died from this. We live in the northeast so right now it’s almost winter and the temperatures are getting very low. I don’t know if this is worms, a disease, etc.