When to euthanize a dog with dementia

It is time to talk to your vet about euthanasia when your dog with dementia spends more of the day and night anxious, lost or distressed than settled, and treatment no longer changes that. There is no test that marks the point. The decision rests on how your dog's days and nights actually go, and that is something you can track.

Dementia in dogs is called canine cognitive dysfunction. It gets worse over time and cannot be reversed, so for most owners the question is when, and how to be sure.

Why canine cognitive dysfunction makes this decision so hard

With most illnesses the body fails and the decision follows. A dog with dementia may still eat well, walk well and have normal blood tests. Nothing forces your hand, and there is rarely a crisis that makes the choice for you.

The decline is also slow. You adjust to each new stage, so a night that would have alarmed you a year ago now feels ordinary. And there are still good moments: a wag at breakfast, a flash of recognition, a short walk that goes well.

What matters is that the suffering in dementia is mental. Fear, confusion and lost sleep count as much as physical pain. A dog who is frightened for most of every night has a poor quality of life, however healthy the body looks.

Signs it may be time to put a dog with dementia to sleep

One or two of these, managed with your vet's help, is living with dementia. Several of them on most days, despite treatment, means quality of life is failing.

• Night-time distress that cannot be settled. Pacing, panting, whining or barking for hours on most nights, even with medication and a set routine.
• No longer recognizing family. No greeting, startling at familiar people, or taking no comfort from being touched or held.
• Getting stuck. Wedged in corners, behind furniture or on the hinge side of a door, and standing there or crying until someone comes.
• Constant anxiety. Trembling, panting, clinging or panicking when alone, with few calm stretches in a day.
• House soiling that upsets them. Accidents followed by agitation, or lying and walking in the mess without understanding what has happened.
• Not eating. Forgetting where the bowl is, standing over food without eating, or losing weight.
• Nothing left that they enjoy. No interest in walks, people, toys or treats that used to matter.

What to try with your vet first

Start by making sure it is dementia. Pain, failing sight or hearing, urinary infections, hormone diseases and brain tumors can all look similar, and some of them can be treated. Arthritis pain in particular is a common reason for an old dog to be restless at night. If nobody has confirmed the cause yet, our dog dementia signs checklist is a useful thing to fill in and take to the appointment.

Then ask what is left to try. Options your vet may discuss include:

• A prescription medicine for cognitive dysfunction
• Anti-anxiety or sleep medicine for the nights
• A diet or supplement designed to support the aging brain
• A trial of pain relief, in case pain is part of the picture

Your vet chooses what suits your dog and sets the dose. Do not give human sleeping pills, sedatives or painkillers. Ibuprofen, naproxen, acetaminophen (paracetamol) and aspirin can seriously harm or kill a dog and must not be given unless a vet has specifically directed it.

Changes at home help some dogs too: a fixed daily routine, night lights, blocking off corners and stairs, more toilet trips, daytime walks with plenty of sniffing, and a bed near yours. Our guide to cognitive dysfunction in senior pets covers these in more detail.

Agree with your vet how long to give each change before judging it. Treatment can ease the signs for a while, but it does not stop the disease. For what the stages and timescale usually look like, see how long a dog can live with dementia.

How to know when: a good-days and bad-days method

Memory is unreliable when you are tired and the change is gradual, so keep a written record.

1. Define a good day. For example: slept most of the night, ate, knew the family, showed interest in something.
2. Define a bad day. For example: hours of pacing, stuck and crying, would not eat, soiled and upset, did not know you.
3. Mark the calendar every evening. One mark for the day and one for the night before. With dementia the nights are often the worst part and the easiest to leave out.
4. Set your line in advance. Decide now, with everyone in the household, what would mean it is time. Bad days outnumbering good ones over two weeks is a common choice.
5. Review weekly. Look at the marks together, and share them with your vet.

Setting the line while you are calm matters. Without it, most people keep moving it.

A structured score helps as a second opinion. The quality-of-life scale for senior dogs rates hurt, hunger, hydration, hygiene, happiness, mobility and whether there are more good days than bad. A dog with dementia can score well on the physical items and badly on happiness and good days, so give those two full weight. When to say goodbye covers the wider decision.

Your own exhaustion counts

Caring for a dog with dementia can mean months of broken sleep, daily cleaning and never being able to leave the house for long. That wears down your health, your work, your family and, in the end, your patience with the dog.

This is a legitimate part of the decision, and one to raise with your vet. A dog's welfare depends on having a carer who can cope. Say honestly how the nights are going. Sometimes there is help that changes things, such as a different night-time medicine, a sitter, or sharing the nights between family members.

If those have been tried and you are still at the end of what you can do, that is reason enough to have the conversation. Your dog has no sense of the weeks they might have had. They only experience the days they are in, and you are the one who can see whether those days are still worth having.

Planning the day

Euthanasia is carried out only by a veterinarian. Never attempt it yourself. The vet normally gives a sedative first, so your dog is asleep before the final injection. What happens during pet euthanasia explains each step.

A few things are worth thinking about for a dog with dementia in particular:

• Home or clinic. Travel and unfamiliar rooms frighten many dogs with dementia. Ask whether a vet in your area offers home visits. If you go to the clinic, ask for a quiet time and whether sedation can be given early. Fees differ, and how much it costs to put a dog down sets out the usual ranges.
• Time of day. Many dogs with dementia are at their best in the morning and worst in the evening. Book for your dog's better hours.
• Aftercare. Decide between cremation and burial beforehand, so you are not choosing in the room.
• Who will be there. Agree it in advance, including whether children will attend.

Many owners of dogs with dementia feel relief afterwards as well as grief, partly because they have been losing the dog a little at a time for months. Both are normal. Coping with the loss of a pet may help in the days that follow.

When to call the vet today

Dementia comes on slowly. Call your vet or an emergency clinic the same day if you see any of these:

• Sudden confusion, circling, a head tilt or loss of balance, which can point to something other than dementia
• A seizure
• No food for a full day, or not drinking
• Hours of panting, crying or pacing that nothing settles
• An injury from a fall or from getting trapped
• Collapse, labored breathing or pale gums
• Straining to urinate with little or nothing coming out

This article is general educational information and is not veterinary advice. Signs that look like dementia can also come from pain, sensory loss or other illnesses, and only a veterinarian can assess your dog and tell you what treatment is still worth trying. The decision about whether and when to euthanize should be made with your veterinarian, who knows your dog. Never give a dog human medicines unless your vet has directed it.