1. Sudden change in appetite or thirst
Skipping one meal is rarely serious. Skipping two in a row, refusing favourite treats, or suddenly drinking far more water than usual is. These changes can point to anything from a dental issue to early kidney or endocrine disease, and the earlier they are checked, the simpler the fix.
2. Lethargy that lasts more than 24 hours
A quiet day after a long walk is normal. Two days of refusing to play, struggling to climb stairs, or sleeping much more than usual is not. Persistent lethargy is one of the most reliable signals that something is wrong, even when other symptoms are absent.
Pro tip
If lethargy is paired with pale gums, fast breathing, or a swollen belly, treat it as an emergency.
3. Vomiting or diarrhoea that doesn't stop
One episode after a dietary change is usually fine. More than two in 24 hours, blood in either, or pairing with weakness needs a vet the same day. Pets dehydrate fast, especially small dogs and cats.
4. Limping, stiffness or sudden behaviour change
A limp that lasts more than a day, reluctance to be touched, or aggression in a normally calm pet often signals pain. Behaviour change is sometimes the only way an animal asks for help.
5. Anything that just feels wrong
You know your pet better than anyone. If something feels off, a different smell, a strange posture, a new lump, trust that feeling. Vets would rather see a healthy animal than miss a sick one.
- Difficulty breathing or constant panting at rest.
- Inability to urinate or defecate.
- Seizures or sudden disorientation.
- Suspected poisoning or a swallowed object.
Acting early is almost always cheaper, kinder, and more effective than waiting. Keep notes on what you see, take a short video if you can, and reach out to your vet sooner rather than later. Your pet cannot ask, but you can answer.