michaelson alexander wrote:Thank you. Did buy many similar traps previously when it was just mice before the rats moved into the compost but the mice seemed to stop frequenting them after a while. I don't know if natural selection works that fast but the traps did stop working.
Did you try changing the bait and placement? With rats you need to develop trapping skills, rats are intelligent. Use gloves when handling traps so you don't leave a human smell. Put bait out with unset traps so they get used to the traps. That sort of thing.
Kill traps (properly set) are more humane than plaster of paris

(traps in tunnels will ensure a kill, traps without tunnels often catch animals by the leg or tail).