Signs a Pet May Be Suffering
Medically reviewed by Dr. Tiffany Boisjolie, DVM
25 years of veterinary experience, specializing in compassionate in-home end-of-life care for dogs and cats in Arizona.
Reviewed and updated September 1, 2026
One of the hardest parts of caring for an aging or ill pet is that they cannot tell us how they feel. Worse, dogs and cats evolved to actively hide pain and weakness, because in the wild showing either one makes an animal a target. That instinct remains even in a pet who has never known anything but a safe home.
So suffering usually looks quieter than families expect. By the time a pet cries out, collapses, or refuses all food, the underlying problem is often well advanced. Knowing the subtle signs helps you see what your pet cannot say.
Changes in behavior
Behavioral shifts are often the earliest clue:
Physical and postural signs
The body often shows what behavior hints at:
Grooming and self-care
A pet in pain often stops keeping up with itself. In cats this shows as a greasy, matted coat and litter stuck to the fur. In dogs it can be the opposite — obsessive licking or chewing at one spot, often over a joint or a sore. Both directions are worth noticing.
Eating, drinking, and digestion
Pain and nausea suppress appetite. Watch for reluctance to eat or drink, dropping food, chewing on one side, or turning away from favorites. Chronic vomiting, diarrhea, or constipation can also be tied to discomfort, and straining to urinate or defecate is its own kind of distress.
Vocalization
Because pets hide pain, vocalizing is often a late sign. Whimpering, groaning when lying down, yelping when moved or touched, or a cat purring almost constantly can all indicate discomfort. Do not wait for this one — most suffering never gets loud.
Putting the signs together
A single sign in isolation may be nothing, or may be an old injury flaring. Suffering is more likely when signs cluster — withdrawn and not eating and moving stiffly — or when one sign is severe on its own, like breathing distress or pain that medication no longer controls.
Tracking good days and bad days for a couple of weeks helps here too. It shows whether the hard moments are occasional or becoming the norm.
What to do if this sounds familiar
If several of these signs describe your pet, the next step is to work through their quality of life carefully and speak with a veterinarian experienced in end-of-life care. Much suffering can be eased, and a clear-eyed assessment helps you know what you are dealing with. Our Quality of Life Assessment covers each of these areas, and the resources below can help you think it through or reach us when you want to talk.
Sources
- American Animal Hospital Association — AAHA/IAAHPC End-of-Life Care Guidelines
- American Veterinary Medical Association — Recognizing pain in animals
- International Veterinary Academy of Pain Management — Recognizing pain in dogs and cats
- Cornell Feline Health Center — Loving Care for Older Cats
