On the gamecube version of gun I have discovered how to get a "pet" mountain lion. First make sure that you have plenty of health and a full whiskey bottle. Go to the top of the mountain where Colton and Soapy plant the cross (the one near the lake). Near the top there should be two mountain lions. When you get near them they should chase you, let them. Make sure that both mountain lions follow you to the cave entrance. The lions will stop at the cave entrance. If both have followed you they will still try to "attack" you. If you stand just in front of the cave entrance (move around) the cats will still try to get you. After a few minutes eventually one of the lions will "get out" of the cave entrance. Now it will chance you around the hill side. Let him chew on you for a bit (if you have full health and whiskey it shouldn't be a problem). Now go near the bottom of the hill. There is a specific point near the bottom of the hill where the lion will still charge at you, but stop just short of actually attacking you. After a while the lion will retreat to near the cave entrance. At this point he will no longer attack (or really move at all). If you bump into him you can move him around, once you have "moved" him down the hill all you need to do is walk directly behind him and you can make him go where ever you want. You now have a pet mountain lion. You can make him walk all the way around the lake. Warning, do not use a horse, if you bump into the cat while on horse back you will kill it instantly. Also stay away from rocks, if you push your new pet into one of the rocks in the area it will "vanish" into the rock.