NOW FOR FELINE! Rattler Antivenom is licensed for canine, equine, AND FELINE. Rattler Antivenom is an ‘All-In-One Antivenom’ formulated from N. American venoms and effective against envenomation’s from all N. American Pit Vipers, including cottonmouths/water moccasins, copperheads, and rattlesnakes (including Mohave)! Manufactured by Mg Biologics.