Tattoo_mama - We have used ratsak and Talon in the past but i'm reluctant to do so with Olive in the house. It's not just the poison but often the rat will get really doughy and come out and I don't want Olive to pick up a rat or something.

We had a small success. DH managed to catch the rat the other day. Turned out to be small and it got really hot living under the oven we think and I could see it's tail. Anyway DH took the bottom off the oven and sprayed some surface spray down the back of the stove and caught it in some newspaper.
BUT it was only a day or 2 and another one is in the same spot!!!!!!!!!! SOOOO frustrating. Back to square one.
mmm maybe ratsak is appealing...