Our 8 year old black Australorp hen has been getting progressively slower and seems to be a little crooked. Her tail is up, her comb is red, she eats fine. Justs lays down a lot and moves slower. We can't see any obvious damage to her. Did notice that one side of her new feather growth didn't get groomed out as well as the other side and maybe that's why she looks crooked. Could this be arthritis or something? Anything we can do for her? Her life long companion died about a month ago too, so she could be lonely even though we have two other younger hens. Of course, that wouldn't make her crooked.