Louisiana Civil Code Tit. XXIII, Art. 3419.1. Lost things; domestic animals

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.