> anything i can do to help it heal and not leave a scar
Call your vet tomorrow and ask about antibiotics - it might be prudent, given that dogs are likely to stick their nozzers in grubby places (or maybe that's just mine!!). Also, if your dog is a messy eater and generally gets food on his nose then it will be worth making sure the wound is cleaned after every meal.
If it were one of mine I'd put some very dilute hibiscrub in a spray and simply flush the area two or three times a day and blot it dry. If you are careful to preserve the scab, then you reduce the risk of scarring still further - however I expect if it gets annoying he'll simply rub it off!
Hope he's ok and not too upset by the incident