Limping can be caused by injury or infection. Infection can be located in the hoof or the joints. Infection in the joints is called arthritis. Infection in the hoof can be several things. Footrot, or foot abscess are two foot diseases.
First determine which leg the lamb is limping on. In a disease called polyarthritis, the lamb may limp first on one leg and then on another. That is the one way to diagnose polyarthritis. Take the lamb’s temperature. The normal temperature of a lamb is under 103. Remember, though, if you had to chase the lamb, his temperature will rise. It will also be high if he is standing in the hot sun.
Look at each foot to see if there is any evidence of cuts, scratches, or dog bites. Feel the joints to see of they feel swollen or hot. Compare the joint of one leg to that on the opposite leg to help you decide if it is normal or not.
If the joints aren’t swollen or hot and you can’t find a cut or injury, give him several days to see if the limping gets better. If not, take the lamb to your veterinarian