I'm not sure what to do! My favorite and only Barred Rock rooster is periodically shaking his whole body and legs. His eyes, comb,respiration seem fine. Does anyone have ideas as to what I can do for him?I read it could be botulism or erysipelas??? I have some VetRx I have not used. His living conditions have been stable as far as I can see.No other body changes I see.