No clue, give lots of kisses!! Hmm, well, actually.... my grandmother would make a paste out of baking soda and water and put it on stings and bites - it did take the pain/itch away. Could this work on your doggy? Is he messing with it?
I wouldn't worry about putting anything on it unless he was scratching it... if he does, I would just try some insect bite ointment from the drug store... I can't remember the name of it right now.... Caladryl is one of them.