Old Dog Products

Appetite & eating

Senior Dog Not Eating? Appetite Loss in an Older Dog: When to Worry and Gentle Ways to Help

By The Old Dog Products team · Published

Not veterinary advice. This article is general information. It isn’t veterinary advice and can’t replace an exam. If you’re worried about your dog, call your vet.

Few things worry an owner more than a full bowl that doesn’t get touched. Owners often ask online how to get a picky senior dog to eat again. When a senior dog refuses to eat, loss of appetite can have many causes, and an elderly dog doesn’t have much reserve. Here’s how to tell when it’s urgent, what your vet will look for, and gentle things to try once your vet has checked your dog.

🚨 Go to a vet or emergency vet now if your dog isn’t eating AND…

  • Is vomiting or has diarrhea, especially both
  • Is very lethargic, weak, or collapses (a senior dog lethargic and not eating needs help today)
  • Has a swollen, tight belly or yelps when it’s touched
  • Has trouble breathing or pale gums (PetMD; AKC)

Loss of appetite in senior dogs: when to call the veterinarian

Call your veterinarian soon if…

  • Your dog has gone about 24 hours without eating. PetMD advises a vet check if a dog refuses food for more than 24–48 hours, or sooner with vomiting, diarrhea, lethargy or trouble breathing; with an older dog, call at about 24 hours. PetMD notes that sudden appetite loss in senior dogs may signal a serious issue and needs prompt care (PetMD).
  • Appetite has been slowly dropping for days or weeks
  • There’s weight loss, more drinking or peeing, bad breath, or drooling
  • They want to eat but can’t, for example dropping food or chewing on one side
  • They recently started a new medication. AKC notes some medications can affect appetite (AKC).

PetMD puts it plainly: healthy senior dogs may eat a little less, but age is not a reason for a dog to stop eating (PetMD).

Senior dog not eating but drinking water

A dog that is not eating but still drinking still needs your vet. Drinking doesn’t mean your dog feels well, and VCA lists increased drinking as a sign to get a senior dog checked (VCA). Note how much they drink, and tell your vet if eating or drinking changes.

Can dehydration affect a senior dog’s appetite?

A dog who isn’t drinking enough, or is losing fluids through vomiting or diarrhea, may feel unwell and eat less. VCA notes that older dogs may feel less thirsty (VCA). If your dog is not eating or drinking, call your vet.

How long can an old dog go without eating?

Don’t wait to find out. PetMD advises a vet check if a dog refuses food for more than 24–48 hours, or sooner with vomiting, diarrhea, lethargy or trouble breathing (PetMD). With an older dog, call your vet at about 24 hours. Sooner if there are other signs above.

Why might an old dog stop eating? Causes of appetite loss

VCA says that most pets with poor appetite and low energy have an underlying medical cause (VCA). Only your vet can find it, so a dog that is not eating needs a check rather than guesswork. Dog food that’s suddenly refused, or a dog who walks up to the food bowl and turns away, is worth noting. The possibilities vets consider include:

  • Mouth problems: dental disease, sore gums, tumors in the mouth
  • Nausea or gut problems
  • Organ disease: kidney, liver, heart, thyroid, and others
  • Pain anywhere. VCA notes that any painful condition can suppress appetite (VCA)
  • Reduced sense of smell. Scent matters a lot for appetite (VCA)
  • Medication side effects
  • Stress or a change in routine, and cognitive decline in seniors (PetMD)

Dental problems and eating in older dogs

VCA describes “pseudo-anorexia,” where a dog is hungry but finds it hard to pick up, chew, or swallow food (VCA). Watching how your dog approaches the bowl gives your vet useful clues. VCA lists inability to chew dry food and bad breath or drooling among reasons to see the vet (VCA). If your dog wants to eat dry food but walks away, mention it.

Gentle ways to help your dog start eating (after your vet has checked your dog)

Run any diet change by your vet first, especially if your dog has kidney, liver, heart, or digestive problems or is on a prescription diet.

  1. Warm it slightly. Warming food can make it smell stronger. Serve it around body temperature, never hot. Stir it and test it first (AKC on warming food).
  2. Soften it. Add warm water to kibble, or ask your vet about a wet or canned version of their current dog food.
  3. Smaller, more frequent meals at regular times. Ask your vet how many meals a day suit your dog (VCA Feeding Senior Dogs).
  4. A calm, quiet spot, away from other pets who might crowd them. VCA suggests making sure other pets aren’t blocking your senior’s bowls (VCA).
  5. Comfortable bowls. Raised bowls if bending is hard (large or giant breed? ask your vet first, see raised bowls), and wide, shallow dishes if they push food around. Put a non-slip mat under the bowl.
  6. Hand-feeding a few bites can get a reluctant dog started.
  7. Food toppers: ask your vet what’s safe for your dog’s needs. Avoid salty human food and seasoned broths. Never feed onions, garlic, grapes or raisins, or anything with xylitol. These are on the ASPCA Poison Control list of people foods to avoid (ASPCA).
  8. Don’t swap foods every day. Constant changes can upset the stomach and make picky eating worse.
  9. Ask your vet before changing food. If they suggest a new food, follow their plan for switching over.
  10. Watch how they chew. Dropping food, chewing on one side, or pawing at the mouth can mean eating is uncomfortable. That’s a reason to book a vet visit, not to keep trying new foods (see “Call your vet soon” above).
  11. Keep mealtimes quiet and consistent. Same place, same times, no rushing. Stay nearby if your dog likes company while they eat.
  12. Make it a little more interesting. Scattering a few pieces of kibble for a gentle sniff-and-find game, or using a simple puzzle feeder, gets some dogs interested in food. Keep it easy so it doesn’t frustrate them.

Remember: not eating for about 24 hours or more, or not eating along with vomiting, lethargy or weight loss, means calling your vet.

Keep a simple food log for an elderly dog not eating well

DateOffered (what/how much)Ate (approx. %)WaterVomit/stoolEnergyNotes

Weigh your dog weekly if you can, on the same scale. Bring the log to your vet.

Questions to ask your vet

  • Could this be dental pain, nausea, or another medical cause? What tests do you recommend?
  • Is my dog at a healthy weight? What weight should I worry about?
  • Could any current medication be affecting appetite?
  • What food, texture, or topper is safe given my dog’s other conditions?
  • How long without eating before I should call you?

Helpful things for the home

(Products don’t fix appetite loss.) Raised bowl stand · wide, shallow dishes · non-slip bowl mat · lick mat · airtight wet-food storage · water fountain.

If appetite loss is part of a bigger decline, your vet can help you think about your dog’s quality of life.

Sources

Products mentioned

Products don’t treat any condition. They can make the home safer or easier. Ask your vet what suits your dog.

Large or giant breed? Ask your vet before using a raised bowl. Our raised-bowls article explains the bloat caution.

More picks in our product guide: Food & water.