Stewart is no stranger to limping. He has, in his older years, been having issues with hyperkeratosis, where the pad material on his feet grows more than it should, and he gets corn-like growths on the sides of the pads. He's a sensitive boy, and they bother him, making him limp if he's walking on a hard surface. I dremel them down as I can, use Dr. Scholl's corn remover on them, and it's all just part of life for us.