My old dog has stopped eating, what should I do?
Updated By PetymFacts checked against official sources on
Quick answer
Call your vet. In an old dog, going off food is rarely just old age: mouth pain, kidney disease, arthritis pain, nausea and side effects of medicines are common causes, and many can be treated or eased. See a vet within a day, and the same day if your dog also vomits, seems weak, has a swollen belly or struggles to breathe.
Before the visit, check whether your dog wants food but cannot eat it, by sniffing and walking away from the bowl or dropping food, or has no interest at all. That one observation, plus whether it is drinking more and losing weight, helps your vet more than anything else you can tell them.
- Meet your sitter first, free
- PAN-checked, first-aid trained
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When is an old dog not eating an emergency?
Go to a vet now, not tomorrow, if any of these come with the lost appetite.
If Trouble breathing, or white, blue or grey gums
Go to the nearest 24-hour vet now and call ahead so the clinic can prepare. Merck Veterinary Manual
If Collapse, a seizure, or a suspected poisoning
These always mean going to a vet at once. Merck Veterinary Manual
If A swollen, tight belly with retching that brings nothing up, especially in a large dog
Possible bloat, which is life-threatening. Go now. Merck Veterinary Manual
If Vomiting or diarrhoea with weakness or dullness
Same-day vet visit. Old dogs dehydrate faster when they are not eating or drinking. VCA Animal Hospitals
If Not eating for more than a day, even if otherwise bright
Book a vet visit. VCA advises getting your vet involved early, because loss of appetite can signal a serious underlying problem. VCA Animal Hospitals
Is it old age, or something else?
Usually something else. Old age is a time of life, not a disease.
AAHA's senior care guidelines start from the principle that old age is not a disease. A senior dog's appetite may change gently over years, but a dog that stops eating over days or weeks is telling you something. Merck counts dogs as senior from about 7 to 8 years, earlier in large breeds, so a Labrador of nine and a Pomeranian of thirteen can both be in this group.
Vets first separate two things. In true anorexia the dog does not want food, often because of illness, nausea or pain. In what VCA calls pseudo-anorexia the dog is hungry but cannot pick up, chew or swallow food, usually because of the mouth. A dog that walks to the bowl, sniffs, tries and walks away is often in the second group.
What are the common causes in older dogs?
This is what vets look for. Several can be present together.
| Cause | What you might notice | What helps find it | |
|---|---|---|---|
| Mouth pain: gum disease, a broken or infected tooth Merck Veterinary Manual | Bad breath, red or bleeding gums, a swollen face, eating on one side or dropping food. Most dogs hide mouth pain. | A mouth examination; a full check under anaesthetic if needed | |
| Chronic kidney disease Merck Veterinary Manual | Drinking and peeing more first; later loss of appetite, weight loss, vomiting and mouth sores | Blood and urine tests | |
| Pain from arthritis or the back VCA Animal Hospitals | Stiffness, slow to get up, not wanting to bend down to a floor-level bowl | An examination of joints and spine | |
| Nausea, stomach or gut problems VCA Animal Hospitals | Licking lips, drooling, vomiting, eating grass, walking away from food | Examination, blood tests, sometimes X-rays or ultrasound | |
| Side effects of a medicine VCA Animal Hospitals | Appetite dropped after a new medicine was started | Tell the vet every medicine and supplement, with start dates | |
| Cancer, infection, diabetes or other illness VCA Animal Hospitals | Weight loss, low energy, other changes | Blood tests and imaging | |
| Brain ageing (cognitive dysfunction) Cornell University College of Veterinary Medicine | Confusion, changed sleep, forgetting routines including meals | The vet rules out other causes first |
Kidney disease becomes more common from about age 5 to 6 and affects up to 10% of elderly dogs, according to Merck.
What should I note before the vet visit?
Write this down. It makes a short appointment far more useful.
- When the dog last ate a normal meal, and what it has eaten since, including treats and roti. VCA Animal Hospitals
- Whether it seems hungry but cannot eat, or shows no interest at all. VCA Animal Hospitals
- Whether it is drinking or peeing more than usual, an early sign of kidney disease. Merck Veterinary Manual
- Any vomiting, diarrhoea, coughing or change in breathing. VCA Animal Hospitals
- Bad breath, drooling, pawing at the mouth or chewing on one side. Merck Veterinary Manual
- Signs of pain: restlessness, hiding, trouble getting comfortable, licking one spot. Merck Veterinary Manual
- Every medicine and supplement, with the date each one started. VCA Animal Hospitals
- Weight, if you can weigh the dog, and whether you can feel the spine and hips more than before. WSAVA Global Nutrition Committee (chart by Tufts University)
What can I do at home while I wait?
Small comforts help. None of them replace the vet visit.
Do
- Offer the usual food at normal mealtimes in a quiet spot, away from other pets. VCA Animal Hospitals
- Warm wet food to about body temperature and stir out hot spots; VCA notes warmth makes food smell more appealing. VCA Animal Hospitals
- Keep fresh water close to the dog's bed, and feed in the cooler morning and evening in summer. VCA Animal Hospitals
- Raise the bowl a little if bending seems to hurt, and put a mat under it on slippery floors. Merck Veterinary Manual
Don’t
- Give human painkillers, antacids or appetite boosters. Any medicine for an old dog is your vet's decision. Merck Veterinary Manual
- Keep switching foods or piling on treats. It can hide a longer problem from you and the vet. VCA Animal Hospitals
- Force food into the mouth of a dog that may have mouth pain or be nauseous. VCA Animal Hospitals
- Wait for days hoping it passes. In an older dog, early tests find more that can be treated. VCA Animal Hospitals
What if my old dog is near the end of its life?
Sometimes a senior dog stops eating because a long illness is reaching its end. The quality of life scale on Merck's HHHHHMM table asks directly whether the dog can eat on its own, alongside pain, drinking, hygiene, happiness and mobility. Your vet can help you judge which situation you are in, and what can still make your dog comfortable. The pages on the signs a dog is dying and on when it is time to say goodbye go through that conversation.
If you need to travel while your old dog is unwell, care at home keeps its routine and medicines steady. Petym is not taking bookings yet; when it opens, a sitter follows the pet's plan as you write it, logs meals and medicines, and calls you and goes to the nearest 24-hour vet on the city's list in an emergency.
Going away soon? Tell us your dates.
A checked local sitter feeds, walks and keeps your pet company at home, follows your care sheet to the letter and sends a photo every day. Petym is opening city by city: send your dates and we will tell you when a sitter can take them.
- Meet your sitter first, free
- PAN-checked, first-aid trained
- A photo every day
- Pay through Petym, never cash
Questions owners ask
My old dog is not eating but is drinking water. Is that serious?
- It needs a vet visit. Drinking and peeing more than usual is the earliest sign of chronic kidney disease, and loss of appetite comes later, according to Merck. Other illnesses can look similar. Your vet can check kidney function with blood and urine tests.
How long can an old dog go without eating?
- Do not test it. For any dog, call your vet if it has not eaten for more than a day; for an old dog, or one with vomiting, weakness or other illness, go sooner. Senior dogs have less reserve, and VCA advises getting your vet involved early because loss of appetite can signal serious disease.
Can bad teeth stop an old dog eating?
- Yes. Gum disease, broken teeth and infected roots can make chewing painful, and Merck notes that most dogs mask their pain. Signs include bad breath, red or bleeding gums, a swollen face, chewing on one side and dropping food. Your vet can examine the mouth and advise on dental treatment.
Is my old dog dying if it stops eating?
- Not necessarily. Many causes of poor appetite in senior dogs, such as mouth pain, nausea, arthritis pain or a medicine side effect, can be treated or eased. At the end of a long illness, not eating can be part of declining quality of life. Your vet can tell you which it is.
Should I hand-feed my old dog?
- Offering food by hand or warming it can help a dog that is a little off its food, and it is fine while you wait for the vet. But a dog that only eats from your hand, or only treats, is eating less than it needs, and the Ohio State quality of life scale counts that as a sign worth discussing with your vet.
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Sources
Each source was opened and read on the date shown. How Petym checks its sources
- Merck Veterinary Manual: Routine health care of dogs (opens in a new tab)
- VCA Animal Hospitals: Anorexia in dogs (opens in a new tab)
- Merck Veterinary Manual: Noninfectious diseases of the urinary system in dogs (opens in a new tab)
- Merck Veterinary Manual: Dental disorders of dogs (dog owners; full review May 2018, updated October 2025) (opens in a new tab)
- Merck Veterinary Manual: Table: HHHHHMM quality-of-life scale (opens in a new tab)
- The Ohio State University Veterinary Medical Center, Honoring the Bond: How will I know? Assessing quality of life and making difficult decisions for your pet (booklet with quality of life scale, PDF) (opens in a new tab)
Show all 13 sourcesShow fewer
- Merck Veterinary Manual: What to do in a dog or cat emergency (opens in a new tab)
- Merck Veterinary Manual: Disorders of the stomach and intestines in dogs (bloat) (opens in a new tab)
- Cornell University College of Veterinary Medicine: Cognitive dysfunction syndrome (Riney Canine Health Center) (opens in a new tab)
- Merck Veterinary Manual: Recognizing and assessing pain in animals (opens in a new tab)
- WSAVA Global Nutrition Committee (chart by Tufts University): Muscle condition score chart for dogs (opens in a new tab)
- Merck Veterinary Manual: Toxicoses from human analgesics in animals (full review July 2024, updated May 2025) (opens in a new tab)
- AAHA (JAAHA): 2023 AAHA senior care guidelines for dogs and cats (abstract) (opens in a new tab)