I have a white silkie that developed normally as a chick, but I noticed today he was limping a little. One hock is larger than the other and is actually causing his leg to spraddle out to the side when he walks. It doesn't seem to be painful and he has full range of motion in that leg, the alignment just isn't right. The joint does seem considerably larger than the other leg, but it doesn't appear to be larger from swelling.