Hi Sasvermont - This limping thing happened to my Braydee when he was really little. Turns out he probably pulled a muscle in his leg. I did take him to the vet but that was to ease my mind. Her examination just made me feel better that nothing was out of joint or broken and he healed within a couple of weeks. Hopefully that's all it is. I'd still have it checked just to ease your mind though. Did you check him over to see that he hasn't been bitten. Sometimes the smallest bite can get infected and cause a real problem.