Although the specific consequences may vary depending on local laws, generally the owner of a dog that bites another dog can be held financially responsible for any veterinary bills caused by the attack. In some jurisdictions, aggression towards other animals can result in the dog being classified as dangerous.
When a dog fight results in injury to one or both dogs, it is best to seek immediate veterinary attention to prevent medical complications from arising. The owner of the dog that initiated the fight is generally responsible for paying all the veterinary bills. Homeowner's or renter's insurance may cover these expenses if the insurance company is notified in a timely manner. The owner of the aggressive dog should document any bills paid because the owners of the injured dog can sue for damages.
In some jurisdictions, an attack on another dog may cause animal control to designate the dog as a dangerous animal. This usually means that the owner is expected to meet certain standards, such as adhering to fencing requirements and never letting the dog off-leash in public areas. If the dog that initiated the fight is behind on its vaccinations, animal control may require the dog to be quarantined for 10 days. This ensures the dog does not have rabies. The owner of the dog is usually responsible for any expenses incurred during the quarantine.