Will Peanut Butter Kill Mice?

While peanut butter is an effective bait for traps, it's not something that you want to feed to your pet mouse. Peanut butter can be extremely dangerous for them because they don't have the necessary physiological features to clear their airways if they get clogged.

What to mix with peanut butter to kill mice?

Mix one sachet of aspartame sweetener, like this one, into one teaspoon of peanut butter. Roll the mixture into two balls of equal size and place them in strategic positions around your home. Attracted by the irresistible scent of peanut butter, mice will gobble this mixture up and die soon afterward.

What food will kill mice instantly?

Chocolate

One way to do this is to mix some cocoa powder and flour with baking soda or boric acid. Baking soda or boric acid creates a lot of gas inside the rodent's digestive system. The mouse does not have the ability to expel this much amount of gas, so it eventually kills them.