Look at these videos. Chloe's left rear (driver's rear) leg is twitching. It looks like something is hurting the way she twitches it. However, she can walk, run, and jump without any problem. It doesn't do it all the time, mostly when she is at her bowl eating, or sometimes if she is laying in the "down" position and putting her weight on it. I can tell that she is walking lightly on that leg, so I think something must be hurting in it? Anyone ever see anything like this. Here are two videos showing it.
Twitching leg video Twitching leg video 2