I left before the dog got up this morning (he likes to sleep in). And when I got home, he was limping. My boyfriend took him out when they got up and he said he was fine. It is the right front paw and I looked it over and there is no visible sign of injury. It does seem as if he doesn't want me to touch it. It isn't broken so I am assuming it is a sprain of some sort. He is a small dog and has to jump to get on and off furniture so I think he hurt it that way. Anyway, should we take him to the vet or see if it improves.