WORD OF WARNING rat poison killed one of my Fox terriers and put another on a drip for two days at the vets in their IC unit. One of my neighbours must have put it down. I asked around, but no one admitted it. I find the best method is a cage trap. Catch a rat or two, move it, catch another,move it etc etc They have regular runs if you watch them. I still, every couple of months find an unmarked dead rat lying around my place. No idea where they come from.