Dog got bit by another dog

Question
I have a puppy approximently 7 1/2 months old.  Yesterday, we went to the dog park and our puppy had a large dog approach him.  The dog went after him, and our puppy yelped.  At the time we thought nothing had happened...but later that night when we got home we saw a wound under his chin.  It's not too big and it hasn't been bleeding too much, but it still makes me nervous as a first time dog owner.  If I would've known the other dog had bit my dog, I would have asked the owner if he was current with his shots and for a bit more information.  Our puppy has had all of his shots, and is up-to-date.  Do I have anything to worry about?  Should we contact our vet?

Answer
I would recommend that you call your vet first thing in the morning.  Rabies is always of concern and most bite wounds need to be treated with antibiotics. Try to clean the wound as best as possible with warm water and soap, squirt with bactine and apply neosporin.