I have to give him credit. He has a better stomach then I do.
But in all reality he should be fine. They do carry bacteria on them and I would watch for any unusual signs of fever or flushness of the face. I would make sure that you have him gargle with an antiseptic mouth wash to be on the safe side.
May want to look at his stools for about a week for possible intestinal worms that may enter via the intestinal tract from sand or worms. Pin or hook worms would be what to look for.
If no fever or mouth sores appear then he should be back to skinning his toes in no time.
He should be fine.