They inflict a long lingering death. No vermin deserves that. I saw numerous rats glued down when in Brunei. They were alive and screaming. You then have to dispatch them. When I had rats I used cage traps and give the rats a flying chance, by releasing them on the lawn. My dogs at that time dispatched them quickly and humanely. Some did make it into the undergrowth to freedom, so fair dues. Cats are OK, but they just kill everything, including the birds and lizards.