The owner of a dog or other animal may be liable for negligence in handling the dog when the dog causes personal injury or property damage. Sometimes a plaintiff must show that the owner had knowledge of the dog's dangerous propensities in order for the dog's owner to be liable for negligent handling.
In Pennsylvania, the liability of a dog owner for injuries or damages caused by their dog is governed by both the Dog Law of 1982 and case law. Under the Dog Law, owners are required to have reasonable control over their dogs at all times. If a dog attacks a person without provocation, the owner may be held liable for medical expenses regardless of the dog's prior behavior. However, for claims beyond medical expenses, such as pain and suffering or property damage, the plaintiff typically needs to prove that the owner was negligent and that the owner knew or should have known of the dog's dangerous propensities. This is often referred to as the 'one bite rule,' where liability may hinge on whether the dog had previously exhibited aggressive behavior and the owner was aware of this behavior. In cases where the owner knew of the dog's dangerous tendencies, they may be held liable for failing to take proper precautions to prevent the dog from causing harm.