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Dog Health

5 Signs Your Dog Needs to See a Vet

05 June 2026

As a dog owner, it can sometimes be difficult to know when a trip to the vet is necessary. Dogs can't tell us when they're feeling unwell, so it's important to watch for changes in their behaviour and physical condition.

1. Changes in Eating or Drinking Habits

If your dog suddenly stops eating, drinks much more or much less water than usual, or shows a significant change in appetite, this can be a sign of an underlying health issue. A day without eating is usually not cause for alarm, but two or more days warrants a call to your vet.

2. Lethargy or Unusual Tiredness

While dogs do have lazy days, persistent lethargy — especially when combined with other symptoms — is worth investigating. If your normally energetic dog has been unusually quiet or reluctant to exercise for more than a day or two, contact your vet.

3. Vomiting or Diarrhoea

Occasional vomiting can be normal, but frequent vomiting, blood in vomit or stool, or diarrhoea lasting more than 24 hours needs veterinary attention. Dehydration can become serious quickly, especially in smaller dogs.

4. Difficulty Breathing

Laboured breathing, wheezing, persistent coughing, or breathing with an open mouth (in dogs) are always serious symptoms. If you notice any of these, contact your vet immediately.

5. Changes in Urination

Straining to urinate, blood in urine, urinating more or less frequently, or accidents in the house from a house-trained dog can all indicate urinary tract issues, kidney problems, or in male dogs, a blocked urethra — which is a medical emergency.

If you're ever unsure whether your pet needs to be seen, it's always better to call and check. Ruby Vets offers phone consultations so you can get professional advice without leaving home.

Have a concern about your pet?

Our vet can visit your home or give you a call to discuss your pet's health.