We put a hot spot collar on our yellow lab to prevent him from licking his back left paw. We used this type of collar instead of the Renaissance collar usually provided by veterinarians. When we removed it this evening, our dog is limping on his right front leg. We can move the leg, feel his paws, and does walk on it, but will favor or lift the leg when walking or resting. What could be wrong? I plan to take him or call the vet tomorrow, but was just wondering if anyone might have a clue of what is wrong?