Trap it in a 4x4 pen with a Dino gate on each side except one side put a behemoth gate (with a door). Idk about other people but I use my frog to knock it out. Mutton or raw prime fish meat or kibble. I feel bad torturing it that it was almost low health and let it recover by itself like a few times just to get its food level very very low, so I don’t have to deal with trying to keep it down or worry that I don’t have enough toxins or whatever.