Live Traps — The Humane Method

  1. 1

    Choose a live catch trap

    Live catch mouse traps are available from hardware stores ($10–30). Multi-catch versions (like the Victor Tin Cat) can hold several mice at once. Single-catch flip traps are simpler. Avoid glue traps — these are considered inhumane as mice can injure themselves trying to escape and die slowly.

  2. 2

    Bait with peanut butter or chocolate

    Place a small amount of peanut butter, chocolate, hazelnut spread or nesting material (cotton wool) at the back of the trap. Mice have poor eyesight but an excellent sense of smell. Wear gloves when setting traps — human scent on the trap can deter mice.

  3. 3

    Place traps along walls and in corners

    Mice travel along walls rather than across open spaces. Place traps flush against walls, behind appliances, under sinks and in corners. The trap entrance should face the wall. Multiple traps placed in a line are more effective than a single trap.

  4. 4

    Check every 6–8 hours

    Check traps frequently. A mouse left in a live trap without food, water and adequate temperature will suffer and die — defeating the humane purpose. Wear gloves when handling traps with mice inside.

  5. 5

    Release at least 1km from home

    Drive or walk at least 1km from your home before releasing. Mice have a strong homing instinct and can return from shorter distances. Release in a green area away from other homes.

Prevention — The Most Important Step

  1. 6

    Seal all entry points

    Mice enter through gaps as small as 6mm (the diameter of a pencil). Seal gaps around pipes, cables and vents with steel wool (mice cannot chew through it) pushed into gaps and then sealed with caulk. Check where cables enter the wall, around plumbing under sinks, gaps in door frames, and weep holes in brick walls. Without sealing entry points, mice will return.

  2. 7

    Remove food sources

    Store all food in sealed containers or in the fridge. Do not leave pet food out overnight. Keep compost bins sealed. Clean up crumbs regularly. Without food, mice have little reason to stay.

Natural deterrentsPeppermint oil-soaked cotton balls placed in entry points and along mouse runs has some deterrent effect — mice dislike the strong smell. Replace every few days as the scent fades. This is a supplementary measure, not a primary solution.

Frequently Asked Questions

Mouse droppings are 3–6mm, pointed at both ends, dark brown. Rat droppings are 12–18mm, blunt at one end. Mouse damage tends to be small, neat gnaw marks. Rats cause larger, more destructive damage. Mice are more common in households — they enter through smaller gaps. If you see large droppings, damage to structural materials, or hear heavy movements in the ceiling at night, you likely have rats rather than mice and more aggressive control methods may be needed.
Evidence is mixed. Mice are deterred by strong smells initially but habituate quickly. Peppermint oil may slow entry at a specific point or keep mice from a small area if the concentration is very high and regularly refreshed. It is not effective as a primary control method. Sealing entry points and removing food sources are far more effective than any repellent.