If he pulls that off and nothing else works, you can try to spritz his toes with a little Bitter Apple. The taste is horrible, and will hopefully be nasty enough to keep him from picking at his toes.
They will hurt and he will be miserable, but at least that will give him time to heal without reopening the wound. It's possible that he may have been allergic to something in there and it's itchy instead of painful.
They will hurt and he will be miserable, but at least that will give him time to heal without reopening the wound. It's possible that he may have been allergic to something in there and it's itchy instead of painful.