Tex. Agric. Code § 143.103 : AGRICULTURE CODE — PRODUCTION, PROCESSING, AND SALE OF ANIMAL PRODUCTS — LIVESTOCK — FENCES; RANGE RESTRICTIONS — ANIMALS RUNNING AT LARGE ON HIGHWAYS — Immunity From Liability

A person whose vehicle strikes, kills, injures, or damages an unattended animal running at large on a highway is not liable for damages to the animal except as a finding of:

(1) gross negligence in the operation of the vehicle; or
(2) wilful intent to strike, kill, injure, or damage the animal.

Tex. Agric. Code § 143.103

Acts 1981, 67th Leg., p. 1350, ch. 388, Sec. 1, eff. 9/1/1981.