La. Stat. tit. 14 § 102.3
If the complaint is made, by affidavit, to any magistrate authorized to issue search warrants in criminal cases, that the complainant has reason to believe that an animal has been or is being cruelly treated in violation of R.S. 14:102.1, in any building or place, such magistrate, if satisfied that there is reasonable cause for such belief, shall issue a search warrant to any law enforcement officer authorized by law to make arrests for such offenses, authorizing any such officer to make a search of said building or place, and to arrest any person found violating R.S. 14:102.1. Said warrant may also authorize said officer to seize any animal believed to be cruelly treated and to take custody thereof. This section shall not be construed as a limitation on the power of law enforcement officers to seize animals as evidence at the time of the arrest.
La. R.S. § 14:102.3