Training & Behavior

Why would a nine-year-old dog who has not had an accident indoors since he was five months old suddenly start weeing on the corner of the sofa?

Because it is not an accident. Marking and toileting are different behaviours with different jobs, and treating one as the other is why so many owners go round in circles with a mop. A dog who needs a wee empties his bladder and leaves a puddle. A dog who is marking deposits a few millilitres, sometimes barely a smear, usually against something vertical, then walks off relaxed.

The clues are consistent. Small volumes. Table legs, the arm of the sofa, curtains, a doorframe, and very often a bag a visitor has just set down. A raised leg, or in bitches and smaller dogs a half-crouch. It tends to start after something changed, and to repeat in the same few spots. Most markers are male, neutered ones included, but confident females do it too.

Rule out the plumbing before you blame the behaviour

Frequent small volumes is also exactly what a urinary tract infection looks like, which is why the first stop is the vet. Take a sample if you can, first thing in the morning. Bladder stones and crystals produce the same picture with discomfort attached, and in older entire males the prostate is worth examining. Anything that increases thirst, including kidney disease, diabetes and Cushing's, makes holding on harder.

In a genuinely old dog, consider canine cognitive dysfunction. Toileting indoors is a classic early sign, alongside altered sleep, standing at the hinge side of a door, and moments where he seems briefly lost in a familiar room. More can be done for it than most owners realise.

One thing gets confused with marking constantly and is not marking at all. If you find a damp patch where the dog has been lying, or dribbling while he sleeps, and he seems unaware of it, that is incontinence. Common in spayed bitches, highly treatable, and no amount of training will touch it.

Cleaning it properly, and why the ammonia in the cupboard undoes your work

Dog urine is largely urea and uric acid. The urea washes away easily, which is why a spot can smell fine to you and still be broadcasting loudly to the dog. Uric acid crystals are not water soluble, they bind into carpet fibres and underlay, and they reactivate in humid weather months later. Use a proper enzymatic cleaner, and far more of it than feels sensible, because urine travels and on carpet that means soaking through the backing. Blot the excess, flood it, then leave it to work rather than scrubbing it dry.

Avoid anything containing ammonia, and read the labels, because plenty of floor and glass cleaners contain it. Urine already smells of ammonia, so cleaning with an ammonia product signs the spot for him and invites him to top it up. Heavily perfumed cleaners that mask rather than break down residue are a milder version of the same problem, and steam can set proteins into the fibres. To see how bad it really is, go round with an ultraviolet torch in the dark.

What to do while the habit fades

Marking is a rehearsed behaviour, and every unsupervised success makes the next one more likely. So for a few weeks, remove the opportunity. Close the doors to the rooms he uses. Keep him in the same room as you, or attach a light house line so you can guide him away calmly without grabbing at a collar.

Then learn his tell. There is almost always a sequence before the leg goes up: a slow wander, a particular sniff, a small circle, a shift of weight. Interrupt there, cheerfully, with his name, and take him straight outside. When he goes out there, pay him properly. High-value food, outdoors, within a second or two, exactly as you would for a puppy. Most owners stopped rewarding toileting years ago and are surprised how fast it works when they start again.

If you find a wet patch after the event, clean it and say nothing. Telling a dog off after the fact teaches him only that you are occasionally frightening for reasons he cannot predict, and dogs punished for weeing learn to do it where you are not, behind the sofa and in the spare room.

Belly bands are worth knowing about. A waist wrap with an absorbent pad inside, they protect your furniture and take the satisfaction out of the act. Management, not treatment. Change them promptly to avoid urine scald and take them off for garden trips.

People ask about neutering, and the honest answer is a qualified maybe. In entire males it does reduce marking in a fair proportion of dogs, with commonly cited figures putting improvement somewhere above half and a much smaller group stopping altogether. But a habit practised for two years has a life of its own once the hormones have gone, and where the marking is anxiety rather than sexual behaviour, surgery may do nothing useful. It is a conversation with your vet, not a switch to flip.

Which brings us to the part that usually matters most. Marking indoors is very often a dog saying he feels unsettled about who and what is in his space. A new dog in the household, a visiting dog who stayed the weekend, a new baby, a house move, or a neighbourhood cat on the front windowsill at three in the morning. Deal with the trigger and the behaviour usually deals with itself. Frosted film across the lower half of the window solves the cat beautifully. A new dog needs separate feeding spots and separate beds, not more shared everything. An unsettled dog needs a predictable routine and a bed nobody else uses.

Most cases resolve in a few weeks of thorough cleaning, close supervision, generous rewards outdoors and one honest look at what changed in the house. The ones that do not usually have either a medical thread nobody chased or a stressor still sitting in the living room. If it is clearly anxiety and management is not enough, a veterinary behaviourist can help, and medication is sometimes part of a sensible plan. What never helps is punishment, and what never helps is the mop alone.