I have an 8 year old dach/bulldog mix. He gets around fine. However, when he isn't moving his back legs will shack. The more active he has just been the more they will shake when he isn't moving. If he has really been going strong his legs will shake violently. He seems to move without problems. I know Dachs, commonly have back problems.

The leg shaking isn't normal and I want to do what I can to ward off any damage or control it. Any idea what is causing this and what I can do to help with it?

Thanks.