How do I puppy-proof or kitten-proof a house?

A room-by-room sweep at animal height, the hazards that actually cause emergency admissions, and the differences between puppy-proofing and kitten-proofing.

Difficulty: beginner
Time: 1 hr 30 min
Read: 5 min
Safety: warning

Short answer

Do the sweep on your hands and knees, room by room, because that is the eye line that matters. Get medicines and cleaning products behind latched doors, cables out of reach, small swallowable objects off the floor, and lilies out of the house entirely if you have a cat.

Vets see the same handful of accidents over and over: a dropped tablet, a bottle of cleaning fluid under the sink, a chewed charger cable, a swallowed sock, a cat shut in a tumble dryer. Almost all of them are prevented by an hour of work before the animal arrives. Doing it at floor level matters, because standing up you simply do not see what a puppy sees.

Safety

The genuinely lethal items in an ordinary home are human medicines, cleaning products, antifreeze, lilies for cats, and small objects that cause gut obstruction — string, hair bobbles, socks, corn cobs and cooked bones. Any suspected ingestion means ringing a vet immediately rather than waiting for symptoms, and never trying to make the animal sick. Do not rely on height as a defence against a kitten: kittens reach almost everywhere, so anything dangerous needs a closed door or a latched cupboard.

What you'll need

Cupboard latches or magnetic catches
Cable tidies or protective conduit
Baby gates (optional)
A lidded bin (optional)
Cord cleats for blinds (optional)

A puppy- and kitten-proofing sweep, room by room

Step by step

Do the whole sweep at their height.Get down on the floor in each room and look. Trailing cables, a gap behind the washing machine, a screw on the floor under a radiator, the underside of a sofa where the lining has torn — none of it is visible from standing.
Secure every medicine, including your own daily ones.A dropped tablet is one of the most common poisoning cases vets deal with. Human painkillers are dangerous to dogs and paracetamol is fatal to cats. Medicines go in a latched cupboard above worktop height, and handbags with paracetamol or gum in them get hung up rather than left on the floor.
Latch the cleaning cupboard.Under-sink cupboards are the classic. Detergent capsules are particularly attractive to puppies and cause serious chemical injury. Magnetic child locks are cheap and effective; a determined puppy opens an unlatched door easily.
Deal with cables properly.Chewed live cables cause burns to the mouth and can be fatal. Run cables behind furniture, inside conduit or spiral wrap, and unplug chargers when they are not in use. Phone charger cables left on the floor are the single most chewed item in most houses.
Remove small swallowable objects.Hair bobbles, socks, children's small toys, batteries, coins, corks, blu tack, elastic bands. Obstructions are major surgery. Button batteries are an emergency of their own because they burn tissue quickly.
For cats, take out every lily, and check bouquets.True lilies and daylilies are lethal to cats in tiny quantities, including pollen groomed off the coat. Other common indoor plants worth removing include dieffenbachia and philodendron. Ask visitors not to bring lilies.
Fit a lidded bin and secure the food waste caddy.Bin raiding accounts for a large share of gut obstructions, mouldy-food poisoning and cooked bone injuries. A pedal bin with a heavy lid, or a bin inside a latched cupboard.
Deal with the appliance and window hazards specific to kittens.Check the washing machine and tumble dryer drums every time before switching them on, and keep the doors shut. Never sit down in a reclining chair without knowing where the kitten is. Restrict upper-floor windows, and fit mesh to balconies — cats fall from windows far more often than people expect and do not reliably land safely.
Tie up blind and curtain cords, and manage stairs.Looped cords are a strangulation risk for kittens and puppies alike; fit a cleat and wind them up out of reach. A baby gate at the bottom of the stairs protects a puppy's joints and stops unsupervised exploring.
Create one genuinely safe room.A space with nothing to destroy and nothing dangerous, where the animal can be left when you cannot supervise. For the first few weeks that is where the puppy or kitten lives when you are busy, and it prevents most of the incidents on this list.

Tips

Supervision is the real safety measure. Puppy-proofing reduces the consequences of the moments you are not watching; it does not replace watching.
Do the garden at the same time — slug pellets, compost heaps, cocoa shell mulch and stored chemicals in the shed are all serious, and antifreeze in the garage is lethal to cats.
Put your vet's number and the emergency provider's address in your phone on day one, before you need them.

Common mistakes

Putting things 'up high' to keep them from a kitten — Kittens get onto worktops, shelves and the tops of wardrobes within weeks. Height is not a barrier; a closed door or a latch is.
Leaving handbags and coats on the floor — They routinely contain sugar-free gum with xylitol, paracetamol and other medication, and they are at exactly puppy height. Hang them up.
Assuming a puppy will not chew a plugged-in cable — It is one of the most common causes of electrical burns in puppies. Cables need to be physically inaccessible, not just discouraged.
Keeping lilies because they are on a high shelf — Pollen drops and gets onto the coat, and grooming does the rest. The only safe approach with cats is not to have them in the house.

If it doesn't work

Puppy keeps finding new things to chew

Cause: Too much unsupervised access — Fix: Reduce the area available with baby gates rather than trying to secure the whole house, and use the safe room when you cannot watch.

Kitten gets on every worktop

Cause: Height is a need, and the worktop is the only high place — Fix: Provide a tall cat tree and clear the worktops of anything edible. Blocking access alone rarely works.

Puppy raids the bin whenever you leave the room

Cause: It has been rewarded, so it will keep trying — Fix: Move the bin into a latched cupboard entirely. Once a dog has succeeded at bin-raiding, deterrence rarely works and management does.

You cannot tell whether something has been swallowed

Cause: It happened out of sight — Fix: Ring the vet and describe what is missing. Do not wait to see if it passes, and never induce vomiting.

Questions people ask

What is the most dangerous thing in an ordinary house for a puppy?

Human medicines, cleaning products including detergent capsules, chewed live cables, and small swallowable objects. Those four account for a large share of emergency admissions and all of them are preventable in an afternoon.

Are houseplants really a problem?

For cats, lilies are a genuine emergency and should not be in the house at all. Several others cause irritation or vomiting. For dogs, the garden and the bin are usually a bigger risk than the houseplants.

Do I need to puppy-proof the whole house?

No — proof the areas the puppy will actually use and gate off the rest for the first few months. A smaller, well-managed space is safer and easier than a whole house done imperfectly.