There are two completely different dogs behind the sentence "my dog isn't eating", and telling them apart is most of the work.
One is bright, bouncy, refusing its bowl and staring hopefully at your plate. The other is quiet, uninterested in everything, and would previously have eaten a chapati off the floor.
The first is a training problem. The second is a medical sign, and in a dog that has always eaten well, sudden appetite loss is one of the more reliable early indicators that something is wrong.
Which one is yours?
| Fussy | Unwell | |
|---|---|---|
| Energy | Normal, bright | Reduced, flat |
| Interest in food | Wants your food, refuses its own | Refuses everything |
| History | Long-standing, gradual | Sudden change |
| Other signs | None | Vomiting, diarrhoea, lethargy, drinking more |
| Behaviour | Normal in every other way | Withdrawn, hiding, restless |
The most useful question: has anything else changed? A dog that has been picky for two years and is otherwise thriving is a household-habits problem. A dog that stopped eating on Tuesday and is not itself is a clinical one.
When to see a vet
Today, or sooner:
- Any puppy that has not eaten for 12 hours, very little reserve, and hypoglycaemia comes on fast
- Refusing food and water
- Vomiting alongside it
- Lethargy, hiding, or a dog that will not get up
- Pale gums
- An unspayed female who is off food and drinking more, pyometra, and this is an emergency
- Any dog with a chronic condition that stops eating
- Visible pain, or a hunched posture
Within 48 hours:
- An adult dog that has eaten nothing for more than 24 hours
- Gradual appetite decline over weeks
- Appetite loss with weight loss
- A senior dog whose eating has changed
Reasonable to watch overnight: an adult dog that skipped one meal, is bright, drinking, playing normally, with no other signs, particularly during a heatwave or after a big meal the day before.
The cause most often missed: the mouth
If your dog is eating less, eating slowly, dropping food, chewing on one side, or has started preferring soft food, look in its mouth.
Dental pain is enormously under-diagnosed, largely because dogs almost never stop eating because of it. They adapt. They swallow food whole, chew on the other side, take longer. From outside it looks like appetite change or "getting old".
At least 80% of dogs over three show signs of periodontal disease. A dog with a fractured tooth or an abscessed root is in constant pain and will still greet you at the door wagging its tail.
Check for: red gums, brown tartar at the gumline, a bad smell, a swelling below the eye, reluctance when you touch one side of the face, or blood-tinged drool.
Other common causes
Nausea. From gastrointestinal upset, kidney disease, medication, or motion. A nauseated dog often lip-licks, drools, swallows repeatedly, or eats grass.
Fever or infection. Appetite is usually one of the first things to go.
Pain anywhere. Not just the mouth, arthritis, a back problem, an injury. Pain suppresses appetite generally.
Kidney or liver disease. Especially in older dogs, often alongside increased drinking.
Pancreatitis. Frequently after a fatty meal, festival food, fried leftovers, a stolen plate. Off food, hunched, sometimes vomiting.
Pyometra in an unspayed female. Off food, drinking more, sometimes discharge, sometimes none at all. Life-threatening.
Recent vaccination. A day of reduced appetite after vaccination is common and self-resolving.
Heat. Indian summers reduce appetite across the board. Normal, provided the dog is otherwise well and drinking.
Stress or change. New home, new person, construction next door, a household member away.
The fussy dog, and how it was created
Almost every genuinely fussy dog was made, and the process is nearly always the same.
The dog does not eat. The owner worries. The owner adds curd, then chicken, then something better. The dog learns, quite reasonably, that waiting produces an upgrade.
At that point the dog is not fussy. It is negotiating, and winning.
Fixing it, once a vet has confirmed there is nothing wrong:
- Put the food down for 15 to 20 minutes
- If it is not eaten, remove it and offer nothing until the next scheduled meal
- No toppings, no hand-feeding, no substitutions, no snacks in between
- Repeat
Most healthy dogs eat properly within two or three days. It feels harsh for about a day and a half; it is not, provided the dog is genuinely healthy.
The part that decides whether it works: everyone in the household has to hold the line, including whoever feeds the dog when you are out. One person slipping food resets the whole thing.
Also check the obvious: how much the dog is actually getting in treats and scraps across the day. A dog receiving 40% of its calories from biscuits, roti pieces and leftovers is not fussy. It is full. And check the food itself, since fat in dry food does go rancid in Indian heat and humidity; a bag that has been open six weeks in a warm kitchen may genuinely taste bad.
The bottom line
Sort the two dogs first. Bright, energetic, and holding out for something better is a household problem with a straightforward fix.
Flat, uninterested in everything, and suddenly different is a medical sign, and if your dog is eating slowly, dropping food or favouring one side, look in its mouth before you look anywhere else.
For puppies, seniors, unspayed females and any dog with a chronic condition, the threshold for concern is much lower than 24 hours.
Appetite loss with increased drinking, in an older dog or an unspayed female, is the combination worth acting on quickly rather than watching.