Back Legs (quaking and hoping)

My Jack Russell is 2 1/2 years old. Within the last year he has started to lift his right-rear leg while walking. He tends to lift the leg when we are walking past a house where he knows there is another dog. He also has the tendency to shake when nervous, excited, or when he feels threatened. Is there a link between the two? Also are x-rays in order for his hind leg? He was recently checked out by a vet (hip rotated, stretched, etc.) and there appeared to be nothing wrong. He never seems in pain or slows down when this happens and is fine when we get back home to play ball. Am I worrying over nothing?

• Re: Back Legs (quaking and hoping) Feb 27 (0)