How to Tell If Your Dog Is in Pain — and When Their Quality of Life Is Slipping

Your dog can't tell you when something hurts, and the changes pain causes are often slow enough to pass for getting older. A dog in treatable pain can still wag at the door and finish their dinner. So the hardest part of loving an aging or unwell dog isn't the big, obvious crisis. It's the quiet, gradual slide that is almost impossible to see from the inside.

This guide covers the signs of pain that veterinary guidelines list, what the two end-of-life quality of life scales behind our calculator measure and where they stop, and how to track the trend at home. None of this replaces your vet. It helps you walk in with something better than a gut feeling.

How can you tell if your dog is in pain?

Look for changes in what your dog does, compared with what is normal for them. WSAVA's guidelines say knowing a dog's normal behavior is valuable because behavior changes are key pain indicators. For acute pain, the guidelines list a change in posture, reduced activity and play, less interest in the surroundings, less willingness to interact, reduced appetite, an abnormal gait or shifting weight, whimpering or crying, reluctance to move, attention to one body part, and a different reaction to being touched in a sore area.⁴

Chronic pain, such as arthritis, looks different: slower and more gradual. The guidelines' list for chronic pain in dogs covers vitality and mobility (energetic or lethargic, able to lie down, sit, jump and exercise), mood and behavior (alert or anxious, playful and sociable or sad, withdrawn and dull), and signs of distress such as growling or whining and how the dog responds to other dogs and people. Stiffness and lameness are on the same list.⁴

None of these is proof on its own. Two or three together, or a familiar behavior quietly disappearing, is worth raising with your vet. In a 2020 paper, several of the authors reviewed 100 recent dog cases from their own caseloads and estimated that around a third of referred cases involved a painful condition, and in some instances nearly 80%.⁶ That is a position paper, not a prevalence study, but it is a reminder that restlessness, irritability or other behavior change can have pain behind it.

A Lap of Love hospice veterinarian adds that many end-stage arthritic dogs begin panting, pacing, whining or crying, which that source attributes to anxiety, usually secondary to pain, and says these signs usually worsen at night.³

WSAVA notes that the gradual changes prolonged pain produces can go unnoticed or get attributed to aging.⁴ For how to catch and monitor that specific pattern, see our guide on spotting and tracking arthritis in dogs and cats, and if your vet has suggested medication for it, what your vet is choosing between for dog arthritis medication.

Do dogs hide their pain?

Sources disagree on the wording and agree on the practical point. The JOURNEYS scale notes that many animals hide pain or weakness as a survival trait.² A Lap of Love hospice veterinarian writes that many professionals believe dogs and cats, as carnivores, do not "hide" pain the way prey animals such as rabbits must.³

The practical point comes from WSAVA. Changes from chronic pain build gradually and can be subtle, so they are easiest to spot for someone familiar with the dog, often the owner.⁴ Illness can also mask the usual signs: the guidelines note that dogs may not vocalize and may avoid moving to avoid making pain worse.⁴ So "my dog isn't crying" tells you less than you would hope.

What quietly signals that a dog's quality of life is slipping?

Quality of life isn't a single thing. It's the balance of several. Dr. Alice Villalobos, a veterinary oncologist, developed the HHHHHMM scale to help owners and veterinarians assess it, and VCA describes it as seven categories scored from 1 to 10, with 10 the best.¹ Villalobos herself noted in 2011 that there were no clinical studies of end-of-life quality of life assessment in pets, which is why a score belongs in a conversation with your vet and not in place of one.⁹ Reframed as everyday questions, the categories are:

• Hurt. Is pain controlled, and can your dog breathe easily? VCA calls adequate pain control, including the ability to breathe properly, an absolute necessity.¹
• Hunger. Is your dog eating willingly? VCA says to try hand-feeding first; if that doesn't work, a feeding tube or a blended or liquid diet may be options to discuss with your vet.¹
• Hydration. Is your dog drinking enough? VCA notes that fluid given under the skin is an easy, well-tolerated way to supplement what an ailing dog drinks.¹
• Hygiene. Can your dog be kept clean and dry, and move away from stool or urine after an accident? VCA also asks about a matted coat and, for bedridden dogs, bedsores.¹
• Happiness. Is your dog still interacting with family and their surroundings? VCA notes that dogs communicate with their eyes as well as by wagging their tails.¹
• Mobility. Can they get around, with or without help? VCA mentions slings, harnesses and wheeled carts as options.¹
• More good days than bad. VCA says quality of life is compromised when there are too many bad days in a row, or when the dog seems "turned off" to life. Bad days may mean nausea, vomiting, diarrhea, seizures, frustration, unrelenting pain or discomfort, or an inability to breathe.¹

Read together, these turn a vague worry into something specific. A dog can score well on mobility but poorly on appetite, or the reverse — and knowing which category is slipping tells you what to raise with your vet, who can often improve it. If your dog is also a senior, our senior pet care checklist pairs well with this as a daily routine.

HHHHHMM category	The question to ask at home	What VCA lists when it is slipping
Hurt	Is pain controlled and is breathing easy?	Pain not controlled; trouble breathing
Hunger	Is your dog eating willingly?	Can't eat properly or willingly; needs hand-feeding
Hydration	Is your dog drinking enough?	Needs extra fluid, such as fluid under the skin from your vet
Hygiene	Can they be kept clean and dry?	Matted coat, can't move away from stool or urine, bedsores
Happiness	Do they still interact with family and surroundings?	Little interaction; seems "turned off" to life
Mobility	Can they get around, with or without help?	Can't move on their own; needs a sling, harness or cart
More good days than bad	Are there too many bad days in a row?	Nausea, vomiting, diarrhea, seizures, unrelenting pain or discomfort

Why one bad day isn't the answer — track the trend

Here's the trap: chronic pain changes build gradually, and dogs have good days and bad days. In interviews with owners of dogs with osteoarthritis, owners described good and bad days that changed how willing and able the dog was to exercise, and several made daily assessments of their dog's gait and attitude before deciding how far to walk.⁷ Judged one day at a time, decline hides in the noise. That's why the most important word in this whole subject is trend.

Score the same categories on a set schedule. Lap of Love suggests having several family members use its tools daily or weekly.³ A total that drifts from 48 to 44 to 39 over three weeks, say, tells you a story you'd never notice day to day. The point isn't the individual score. It's the direction of travel, caught early enough to do something about it with your vet.

Doing this on paper works, but it's easy to let slip. Logging comfort and mobility in one place — where the whole household can add what they see and the trend draws itself — makes a slow slide visible instead of invisible.

How do vets actually measure a dog's quality of life?

Vets use several kinds of tool, and they answer different questions. For chronic pain such as arthritis, WSAVA's guidelines say many owner-completed scales exist but only a few have been validated, and for dogs they recommend the Canine Brief Pain Inventory, which asks 11 questions about pain severity and its impact on quality of life, and the Liverpool Osteoarthritis in Dogs questionnaire, which asks 13 questions about mobility.⁴ Both are filled in by the person who lives with the dog. AAHA's 2022 guidelines likewise say capturing the owner's evaluation is particularly important for chronic pain.⁵

HHHHHMM and JOURNEYS do a different job: they help families talk through end-of-life decisions. VCA says Villalobos designed HHHHHMM to measure the success of a palliative or hospice plan for a dog with a life-limiting disease.¹ The one validation study of it we found in PubMed, of 314 guardians in Italy, reported that the model's fit was "partially adequate."¹⁰ More broadly, a 2015 systematic review of peer-reviewed canine quality of life instruments found that only 11 of 52 showed any evidence of reliability or validity.⁸ That doesn't make these scales useless. It means a score is something to discuss with your vet, not a result.

The second scale, JOURNEYS, was written in 2013 by Dr. Katie Hilst, a veterinarian who provides in-home euthanasia.² It scores eight areas out of 10 each, for a total out of 80: Jumping or mobility, Ouch or pain, Uncertainty and understanding, Respiration, Neatness or hygiene, Eating and drinking, You, and Social ability. The "You" area asks whether you feel overwhelmed, or unable to meet your pet's needs physically, emotionally or financially, and whether there is tension in the family.²

JOURNEYS says there are no hard and fast rules, although a higher score is better. It describes 80 as a happy, healthy pet and 8 as a pet that is suffering, and says a low score on any single measure may be a reason to consider euthanasia and to talk with your veterinarian.² Our dog quality of life calculator is built on both scales, so you can pick whichever fits your situation — or run both and compare.

When is it time to talk to your veterinarian?

No score decides this, and no article should. But some signs shouldn't wait. JOURNEYS says severe episodes of difficulty breathing, coughing or open-mouth breathing call for immediate medical attention.² Call your vet promptly if pain isn't controlled by the current plan, if your dog is refusing food and water, or can't move away from their own waste. And take VCA's warning sign seriously: too many bad days in a row, or a dog who seems "turned off" to life.¹

Having that conversation early isn't giving up. VCA says many medical problems owners assume can't be managed can be, with a vet's help and supportive care, sometimes at minimal expense, and it urges owners to involve their vet and the vet's support staff early.¹ Its list of supportive options includes oral or injectable pain medication, oxygen at home, hand-feeding or a feeding tube, fluid under the skin, and mobility aids such as slings and carts.¹ Lap of Love, a veterinary hospice service, describes the right moment for euthanasia as a subjective window of hours, days, weeks or months rather than one point, and reminds owners that they know their pet better than anyone, including their vet.³

Walking in with a few weeks of scores turns a painful, abstract decision into a grounded, shared one. If a visit is on the horizon, our vet visit preparation checklist shows exactly what to bring.

Important medical disclaimer: SteadyTails is a logging and coordination tool. This guide is for general reference and does not provide veterinary advice, diagnosis, or treatment. Quality-of-life scales support your decisions — they don't make them. Always talk with your veterinarian, who can weigh any score against your dog's specific diagnosis and comfort options.