I noticed the other day that my 9 week old labs leg was shaking when he was sitting. Is this something that I should be worried about or is this normal?

My doggy sometimes shakes. It could be a seizure or just a spasm. Nothing to worry about, it can also be maybe he is scared.

:0 I'm sure it is normal.

I don't think your description matches anything I am familiar with. Likely you will be in again for shots before too long. Mention it to the vet.

The shaking? Oh no for my dog its reallly normal. He has seizures and I'm sure the vet knows but he seems fine. Actually my mother dog who is part lab/germanshepard shakes but when he is scared. Anyway hope your dog is okay