Hello, my Wyandotte too is limping very badly. The only thing unusual about his weaj leg really is that the hock is larger than the hock on the good leg. The hock is not discolored, just swollen. The rooster is limping around and eating and otherwise acting alright but the limp is quite pronounced. I did transition feed over the last month to Grubbly Farms and am wondering if this feed maybe is giving him an excess or a deficiency in something... Or if the feed has nothing to do with it and the cause is something else. Any advice would be appreciated. I do have a hen in another coop across the chicken yard who has had a slight limp for like a week, which makes me wonder if this is a feed issue or a mycoplasma issue? Thanks for any advice you may have.