When should you take your dog with cancer back to the vet?

May 06, 2026
Wanneer moet je met je hond met kanker opnieuw naar de dierenarts?

During cancer treatment, there are good and bad days. But how do you know when something is "normal" within the disease process—and when it's best to contact your vet again?

You should never ignore these signals.

1. Suddenly eating or drinking less

Eating less for one day is possible. Two days is a red flag.

2. Vomiting or diarrhea

Especially in dogs that are receiving medication or chemotherapy, this must be followed up quickly.

3. Increased panting, groaning, or restlessness

This may indicate pain or nausea.

4. Difficulty standing or walking

Suddenly becoming less mobile is never “just old age”.

5. Change in behavior

To withdraw, to stop responding, to hide.

6. Pale mucous membranes or lethargy

May indicate anemia or internal problems.

7. You have a bad feeling

As an owner, you know your dog best. Trust that.

Decision

Better to call once too many than too late. Early intervention can bring a lot of comfort.

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