He was fine on his walks yesterday, can find no obvious injury and he's letting me manipulate it etc. He started carrying his back right leg last night. This morning, he was putting it to the ground but not fully weight bearing. After lying down for a snooze, he's limping on it. How long would you wait and see before heading to the vet? No swelling or anything. He's fed up because I haven't taken him on his morning walk. He's a bit like that Monty Python knight and doesn't know what's good for him.