I have a 10 week old rooster who has a limp. He walks slowly on it pretty well but stands like a flamingo when not moving. It was very muddy yesterday and I think he might have just slipped. On of my hens did something similar last year and was fine in a few days. The other 4 aren't picking on him at all. Any thing I should do? Should I seperate him just in case the others pick on him?