My neighbors dog viciously attacked my small dog out of both our yards never approached us are they liable 1K$?

We did not see attack but other neighbors did and the owner of attack dog was there and screaming watching my dog get excess of 100 stiches 6 drains and a wound 1/8th inch from main artery in neck. Never even had the human compassion to call and tell us or see how he was. Iam mad now my dog is at high risk for sever infection. This bad dog was brought up this way its all she knows.