Article 876 of Civil Code

1 - A movable becomes ownerless if its owner abandons it with the intention of relinquishing ownership. 2 - Wild animals are deemed ownerless so long as they are at large. Nevertheless, if an animal is captured and then becomes free again, it shall not be deemed ownerless unless the owner fails to pursue it immediately or ceases pursuing it. 3 - Animals that have been tamed and accustomed to return to the place designated for them, and then lose that habit, become ownerless so long as they are at large and their owner has ceased pursuing them.