Two of my Jumbo Cornish Crosses are looking TERRIBLE... They can't stand and have very pale combs. I'm at a loss for what could be wrong... Thought at first maybe coccidiosis since they were lethargic so treated them with corid... They aren't improving. One looks like her leg may be swollen and she has stopped growing all together. I don't think they are going to make it much longer but I'm doing everything I know to... Do you have any idea what could be wrong? Is the rest of the flock at risk? Is it more humane to put them down? In which case, is it safe to eat the meat? Thank you so much in advance!! They are separated from the flock and also shaking a lot.