My dog was attacked in New Hampshire by another dog. We were on a mutual friends property. The attacking dog was on a leash but when released immediately ran to and attacked my dog(unleased) without provocation. The owner's of the dog vowed to pay any expensed and expressed regret and blame. when the vet bill came in they said they never claimed that they would pay and sent a check for half the bill with final settlement written on it. Can I cash the check and take them to small claims for the rest of the bill?