Droppings or gnawed packaging in a kitchen cupboard is a clear sign of mice, and the kitchen is usually where they start. Empty the affected cupboards, throw away any opened or gnawed food, and clean down with hot soapy water. Then place locked bait stations under the units, behind appliances and near pipe entry points, not inside the cupboard with your food. For early activity in one or two areas, a 4 box kit is the right starting point.
The clearest sign is droppings, small, dark and around the size of a grain of rice, usually in the back corners of cupboards, along the edges or near food packaging. Alongside that you'll often find gnawed boxes, bags or jar lids, a musty smell in an enclosed cupboard, greasy smear marks where mice brush against surfaces on the same routes, and shredded paper or packaging used for nesting. House mice (Mus musculus) are happy living close to a food source, so a kitchen cupboard with dry goods in it is close to ideal for them.
Before you bait, deal with the food. Empty any cupboard with signs of activity and throw away anything that's been opened or gnawed, even if the damage looks minor, because mice contaminate far more than they eat through droppings and urine. Move sealed tins and jars somewhere safe to check, and wipe everything down with hot soapy water. Mouse droppings and urine can carry bacteria, so wear gloves, do not brush or vacuum dry droppings (which can put particles into the air) and bag them up instead.
This step matters because bait works far better when the easy food is gone. If mice can stroll into an open cupboard full of cereal and pasta, they have little reason to take bait.
Do not put bait inside the cupboard alongside food you've cleaned and put back. Instead, place locked bait stations on the routes mice use to reach the cupboard. Good spots in a kitchen are under the units in the kick board void, behind and under appliances like the fridge, oven and dishwasher, near where pipes or cables come through the wall or floor, and along skirting boards in quiet corners. Mice travel along edges and avoid open space, so a station tucked against a wall or under a unit will get more interest than one out in the open.
Use locked stations rather than loose bait so it stays secure around children and pets and you can see which areas are feeding. Rodenticides such as Brodifacoum and Difenacoum are regulated biocidal products in Great Britain, so follow the product label and use bait responsibly. You can read the HSE rodenticide guidance for the legal position.
A mouse in a kitchen cupboard rarely stays put. The same mice will use wall cavities, pipe runs and under floor voids to reach other rooms, the loft and the utility area. Once the kitchen activity is under control, look for the gaps that let them in: holes around pipework under the sink, gaps behind the kick boards, damaged airbricks, and spaces where cables enter. Mice can squeeze through a gap about the width of a pen, so seal what you find with wire wool and a suitable filler.
If you're also seeing droppings in the loft, utility room or other rooms, you're not dealing with an isolated cupboard problem, you're seeing one infestation moving through the house. In that case step up to the Pest Help Mouse Killer Poison Kit Large, which has 8 bait boxes so you can cover several active areas at once instead of chasing it room to room.
DIY is usually enough for recent activity in one or two cupboards that you can clean and bait safely. Call a professional if mice keep returning after treatment, if there's a dead rodent smell you can't locate, if activity has spread across several rooms, or if your kitchen is part of a food business where there are hygiene rules to meet.
No. Throw away any opened or gnawed packaging, and anything mice could have reached. Mice contaminate food with droppings and urine, so the safe option is to bin anything exposed and keep only sealed tins and jars after checking them.
The kitchen has the most food and warmth, so it's usually where you notice mice first. They may well be using other routes too, but the kitchen is where the signs show up earliest.
Under the units in the kick board void, behind appliances, near pipe entry points and along skirting boards. Keep it in locked stations and away from food, children and pets. Do not place bait in the open or inside cupboards with food.
Clear the food source, clean thoroughly, then seal the gaps they use to get in. Check around pipework, behind kick boards and where cables enter, and fill gaps with wire wool and filler.
If you've found mice in one or two cupboards and the activity is recent, clear and clean those cupboards, then set up the Pest Help Mouse Killer Poison Kit Small along the routes under your units and behind appliances. Check the bait regularly and seal the entry gaps once activity drops off.
