La. Civ. Code art. 3419.1
Current with operative changes from the 2024 Third Special Legislative Session
To claim ownership of a domestic animal pursuant to Article 3419 or 3490, the possessor shall prove that the animal when acquired lacked a microchip or other owner-identifying information such as a collar, rabies tag, or tattoo. The presence of owner-identifying information creates a rebuttable presumption that the possessor has not satisfied the requirements for ownership under Article 3419 or 3490.
La. C.C. § 3419.1