Poison has to be one of the worst ways to put an animal down.
A well placed round will just turn their lights off, no pain.
In my part of the world what happens when you call animal control they might or might not show up. If they do and take the animal to the pound they put them away by shooting them. So what's the difference?
I have several cats on the property and and have no problem at all with cats, but when you are getting overrun with them you have to take measures.
"but when you are getting overrun with them you have to take measures."
Understandable.
Where I live in MA the animal control officer shoots the cats he collects with a shotgun. I think he's a jerk for doing it this way, as he could bring them to a vet and have them euthanized peacefully. I'm sure the vet would give him some kind of deal, as he's the animal control officer, but no, he blows them to bits. I had a 9 week old kitten that he confiscated and blew to bits because the cat, which hadn't yet been vaccinated, had come in contact with a rabid bat (left its head on my doorstep).
Personally, I think the guy gains some pleasure killing them this way...