Dog reduced appetite – when should I see a vet?

Updated 2026-09-30 · 1 sources

Based on: PDSA

Book a vet visit

This is not usually an emergency on its own – contact your vet if it lasts, gets worse or your dog seems unwell in any other way. It can come with weight loss, low energy, a painful mouth, yellowing of the skin or whites of the eyes, extra dribbling, vomiting or diarrhoea.

What you can do now

  1. Note when it started, how often it happens and what else you see.
  2. Keep fresh water available.
  3. Let your dog rest somewhere calm.
  4. Contact your vet if it lasts, gets worse or your dog seems unwell in any other way.

Don't

  • Do not give any human medicine.
  • Do not wait if it gets worse.

What it can mean

Appetites vary between dogs.[1] A change in a dog's eating habits is often a sign of a problem.[1]

Other signs that can come with it

  • Weight loss
  • Low energy (lethargy)
  • A painful mouth
  • Jaundice, where the skin or whites of the eyes turn yellow
  • Dribbling more than usual
  • Vomiting and/or diarrhoea

What the experts say

“Weight loss ; Low energy (lethargy) ; A painful mouth (struggling to eat or eating on one side of their face) ; Jaundice (where the skin/whites of the eyes turn yellow) ; Dribbling more than usual ; Vomiting and/or diarrhoea”

If your pet is struggling to breathe, has collapsed, is having a seizure or can't stand up: go to the nearest vet now.

Not sure how serious it is?

OkPaw asks a few quick questions about your pet and tells you in 30 seconds whether it can wait. Free on Google Play for Android.

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Common questions

What can reduced appetite mean in a dog?

A change in a dog's eating habits is often a sign of a problem.[1]

What signs can come with reduced appetite?

It can come with weight loss, low energy, a painful mouth, jaundice, extra dribbling, vomiting or diarrhoea.[1]

How might a painful mouth affect eating?

A dog with a painful mouth may struggle to eat or eat on one side of their face.[1]

Sources

  1. PDSA

How this page was made: written with the help of AI from the sources below, then checked claim by claim against those sources. Urgency levels follow OkPaw’s fixed safety rules. It is guidance, not a diagnosis. How we write our pages

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