My 5 year old silkie rooster is having trouble walking! he tries to walk and then his legs stiffen up and he walks higher and higher up on his toes until he falls over! once he falls, his legs are too weak for him to get up again intil he's rested them for a while. he didn't get into a fight-he's still head of the flock, and there's no sign of broken bones and no flesh wounds. is this marek's? i know silkies are prone to it. what can i do to help him? if you don't have any advice at least send out some prayers or good thought for my little raven, please. he's my favorite rooster and so sweet and the head of the flock over all of the other roosters, even the games! please help!