Absolutely jOhn. Rats are pretty clever too. i think this type of bait is pretty much safe to use. rats love onions too. So get a swing bin, put peanut butter in the middle of the lid. Next morning you will have a good few. The mice are dead within 20 minutes. Good luckMy mom always put peanut butter on traps. Now I know that we could have saved money buying traps, She never reused them, just tossed mouse and trap in the garbage.