Dog not eating (loss of appetite)
A dog who skips one meal but is otherwise bright and active is often not an emergency, but a complete refusal to eat for more than about a day, or appetite loss alongside vomiting, lethargy, a swollen belly, pain or other illness, needs veterinary attention. Not eating is a non-specific sign that can accompany pain, infection, dental disease, organ problems or obstruction. Puppies and small dogs can develop low blood sugar quickly, so they should be seen sooner rather than later.
Go to a vet now if
- Not eating at all combined with vomiting, a swollen belly, or unproductive retching
- Weakness, collapse, pale gums, or laboured breathing
- A puppy or small dog who refuses food and is lethargic or wobbly
- Refusing food after a possible toxin, bone, or foreign-object ingestion
Call a vet today if
- Eating less than usual but still drinking and behaving normally
- Skipped one meal in hot weather or after a stressful event, then improving
What to tell the vet
- How long since they last ate normally
- Whether they are still drinking
- Other signs: vomiting, diarrhoea, lethargy, pain
- Recent diet change, travel or stress
- Possible access to toxins or foreign objects
- Weight, age, and any conditions or medicines
What not to do
- Do not force-feed a weak, vomiting or collapsing dog
- Do not give human medicines to stimulate appetite
- Do not ignore a puppy that won't eat and seems wobbly — that can be low blood sugar
What your vet may check
Your vet may examine the mouth and abdomen, check hydration and temperature, and may use blood tests or imaging to find the cause. Care is individual and veterinary-led.
Recovery support after veterinary assessment
When your vet has identified and addressed the cause, rebuilding appetite is part of recovery. Palatable, energy-dense support positioned for convalescence — such as Alfavet ReConvales Tonicum, ReConvales Power or ReConvales Energy mixed into food — may help encourage eating, used on veterinary advice once your dog is stable.
Frequently asked questions
How long can a dog safely go without eating?
A healthy adult dog can miss a meal or two, but refusing all food for more than about a day, or appetite loss with other signs, warrants a vet call. Puppies and small dogs need attention sooner.
My dog won't eat but is drinking and acting normal — is that an emergency?
Often not immediately, but monitor closely. If it lasts beyond a day or other signs appear (vomiting, lethargy, pain), contact your vet.
Should I force-feed my dog?
No, not without veterinary guidance — force-feeding a nauseated or weak dog can be harmful. Your vet can advise the safest way to restart eating.
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Sources & standards
Emergency guidance follows AVMA, Merck Veterinary Manual, ASPCA Animal Poison Control, and small-animal emergency-medicine standards, reviewed by our veterinary advisory board.