Dog Health Questions? Ask a Dog Vet for Answers ASAP
The only way in which rabies can be transmitted is by a clinically ill animal transferring saliva to an open wound. Your dog having a scratch on its nose is at risk. The appropriate thing to do for the best prevention would be to get a rabies booster for your dog to activate the immunity from his regular inoculation. Call your vet to see about a booster as soon as possible.