DKS
Wax on, Wax off.
Or a nice 870 with 3" magnums with some #4's, just to make the point to the ones that are watching when it explodes.
There is nothing right about that bullshit. No need to kill them. Find another means to get rid of them that doesn't involve killing them. That Tylenol bullshit makes a cat die a horrible, painful, long lasting spiral to death. I see anyone doing that shit and I'll report them to the police for animal cruelty.
I don't like cats one damned bit. I hate them. I'm allergic to them and I detest it when they leave their fucking paw prints all over our truck. But there's nothing right about killing them through torture.