When trying to tame the thylacoleo you need a argentavis or something that can pick up a thylacoleo. Definitely bump up as much health on it as you can on it. build a 2x2 base with doors all around it so you can shoot it through the door frames. then grab the thylacoleo with your bird and put him in the little basebuild a 2x2 base with doors all around it so you can shoot it through the door frames.

More Thylacoleo Taming & KO Tips