I have a three year old male Corgi that strained a muscle in his right hip recently. He started favoring that leg buy lifting it slightly off the ground when he walked occasionally putting it down. He is currently on Previcox for inflammation. He's doing great now but, I've noticed him bunny hopping when running and don't recall him doing that much, if at all before. Is this cause for concern? They x-rayed his leg/hips and said they looked good...no fractures or breaks and the joints looked fine.