What is negligence per se?

Negligence per se applies when a defendant's violation of a specific statute or local ordinance directly causes injury. In dog bite cases, this doctrine becomes powerful because Texas municipalities and counties have enacted leash laws and animal control ordinances that establish clear duties for dog owners. When an owner violates these regulations and the dog subsequently bites someone, that statutory breach can establish negligence without requiring proof of the owner's state of mind or carelessness.

For example, if a Texas city ordinance requires dogs to be leashed in public spaces or contained on private property, and an owner's unleashed dog bites a person, the violation itself may be treated as negligence per se. The injured party does not need to prove the owner acted recklessly or failed to exercise reasonable care. Instead, the law presumes negligence based on the violation alone. The plaintiff still must show that the statutory violation caused the injury and that they fall within the class of people the law was designed to protect.

This doctrine simplifies liability in dog bite claims because it shifts focus from subjective judgments about the owner's conduct to objective facts: was there a violation? If yes, negligence is established. Texas courts recognize negligence per se as a valid basis for liability in personal injury actions, making it a valuable tool in dog bite injury claims. Owners can face significant liability even if they believed their dog was harmless or if the incident seemed unforeseeable.