Hi everyone, so I have a Rhode Island Red Rooster that is 9 years. I know lifespan is around 8yrs but hes well tended. My chickens are in a large area that has straw on the ground, they are fed scratch grain and fresh water daily. My rooster has been laying one wing to the ground and going around in circles for a few weeks. I thought he hurt his wing but I can't find any problem. Now his legs are blue and he's refusing to stand or walk. Is this age, illness, or nutrition related? Any advise is so appreciated.