I'm concerned that Penny may have a luxating patella. For those who don't know, she's a 1 year old Yorkshire Terrier. We'll be heading to the vet in a couple weeks for HW tests and I'll have the vet check her then. In the meantime, if she does have them, or at least one (left rear), what should I be doing? What about exercise? Let her run around the yard like normal? Don't let her run? I had hoped to start CATs with her but with this issue popping up, should I forget that? The reason for my suspicion is that when she's running, sometimes - not always, she'll randomly start limping and then a few steps later correct herself. Did a little research and Youtube video watching, and this is my conclusion. It doesn't seem to bother her when it happens and she doesn't act like it hurts either. She just goes about her business like nothing happened.