House training an adult dog is not fundamentally different from house training a puppy, but the reasons for failure are different — and one of them needs ruling out first.
Rule out medical causes
An adult dog who was reliably house trained and has started toileting indoors is showing a symptom until proven otherwise.
Common causes:
- Urinary tract infection — frequent small amounts, straining, sometimes blood, and urgency
- Kidney disease or diabetes — increased drinking and larger volumes
- Cushing’s disease
- Incontinence, particularly in spayed females — usually leaking while asleep, with a wet patch where the dog was lying
- Bladder stones
- Arthritis or pain, making it hard to get to the door or to posture
- Cognitive dysfunction in older dogs, where the dog seems to forget the routine
- Digestive disease, for faecal accidents
See a vet before starting a training programme. Training a dog who physically cannot hold on is unfair and it will not work.
Rule out the other three things
Marking. Small amounts, on vertical surfaces, often after a change — a new dog, a visitor, a house move, furniture that smells of another animal. This is communication rather than elimination. It is more common in entire males but any dog can do it.
Anxiety. Toileting that happens only when the dog is left alone, usually with other signs — pacing, destruction near exits, vocalising. That is separation-related distress, and house training will not touch it.
Submissive or excitement urination. A small amount when greeting, often with a lowered body, flattened ears and an appeasing posture. Never tell a dog off for this; it makes it worse. Greet calmly, ignore the dog for the first minute, and let them come to you.
The programme
Assuming a healthy dog who simply does not have the habit — which describes most kennel dogs, many rescue dogs, and dogs from some breeding situations.
Treat them as you would an eight-week-old puppy. That is not an insult to the dog; it is the fastest route.
1. Supervise or confine, always
The dog is either:
- Within sight, actively supervised
- On a lead attached to you — “umbilical training”, which sounds odd and works extremely well
- In a crate, a pen, or a small safe room
There is no fourth option for the first fortnight. Every accident indoors is a rehearsal and a scent marker; preventing them entirely is most of the work.
2. Take them out on a fixed schedule
- First thing in the morning
- After every meal, within fifteen minutes
- After every nap
- After play or excitement
- Before bed
- Every two hours in between, at first
Go to the same spot. Stand still and be boring — no talking, no playing, no walking about. Give them five minutes.
3. Reward heavily, outside, immediately
This is where most people fail. The reward must come outside, within a second or two of finishing, not when you get back in.
Use something excellent. Roast chicken for a wee in the right place is not excessive in week one.
Add a cue — “be quick”, “get busy” — said quietly *while* they are going, so it eventually predicts the behaviour.
Do not take the dog straight back inside afterwards. If going to the toilet ends the walk, dogs learn to hold on. Have a short play or a sniff afterwards.
4. Learn the pre-toilet signals
Most dogs have a tell: circling, sniffing intently, sudden restlessness, heading for a particular room, going behind furniture.
When you see it, interrupt gently and go outside immediately.
5. Clean accidents properly
Enzymatic cleaner only. Ordinary household cleaners remove the visible mess and leave the scent markers that tell a dog this is the toilet.
Never use ammonia-based products — urine contains ammonia, so you are effectively labelling the spot.
Never punish. Rubbing a dog’s nose in it, telling them off, or reacting when you find it later achieves nothing except teaching the dog to toilet where you cannot see them — which usually means behind the sofa rather than in front of you.
If you catch them in the act, interrupt with a neutral noise, carry or lead them outside, and reward heavily if they finish there.
6. Night time
- Lift the water bowl an hour or two before bed for a healthy adult dog — not in hot weather, and not for a dog with any medical condition
- Last toilet trip immediately before bed
- Crate or confine at night, beside your bed at first, so you hear them
- Set an alarm for the middle of the night for the first week if needed
Kennel dogs specifically
Dogs who have lived in kennels often have no concept of holding on, because there was nowhere to hold it for. Some also learned to toilet on concrete and are confused by grass.
Expect it to take longer, and be patient about surface preferences — take them to whatever surface they are used to, then transition gradually.
Timeline
Most adult dogs are substantially reliable within two to four weeks of consistent management. Progress is not linear, and setbacks after a house move, a new pet or a period of illness are normal.
The commonest cause of failure is giving freedom too early. A dog who has been clean for five days is not yet trained; they have simply been well managed. Increase freedom gradually, a room at a time, over weeks.
Puppy pads: a warning
They teach a dog that toileting indoors is acceptable, and then you have to untrain it. For an adult dog in a house with outdoor access, skip them.
They have a legitimate place for dogs in high-rise flats, dogs on restricted movement after surgery, and very small dogs in severe weather. Used as a convenience, they slow everything down.
