What should you know about canine stomach cancer?

Signs can include reduced appetite, vomiting, weight loss, dark or bloody stool, abdominal discomfort, and tiredness. These changes have many possible causes, so they cannot confirm cancer on their own.

A stomach tumour can interfere with eating, digestion, and the passage of food. Some tumours may ulcerate and bleed; others may narrow the stomach outlet or spread beyond the stomach. The tumour type, its location, and whether it has spread shape the treatment discussion.

A veterinarian may use blood tests and imaging to investigate illness, but examining a tissue sample is generally needed to identify the tumour. Staging checks help show whether disease is confined to the stomach or present elsewhere.

Arrange a veterinary appointment if your dog has persistent digestive changes, unexplained weight loss, or a sustained drop in appetite. Note when each sign began, how often vomiting occurs, stool colour, food and water intake, current medicines, and any recent dietary changes.

Treatment may involve surgery when the tumour can be removed, drug treatment for selected tumour types, symptom control, nutritional support, or comfort-focused care. A veterinary oncologist can explain the likely benefits and burdens for your dog. Do not give human painkillers or anti-sickness medicines unless a veterinarian specifically prescribes them.

Seek urgent veterinary care for vomiting blood, black tar-like stool, repeated vomiting with inability to keep water down, collapse, marked weakness, a swollen or painful abdomen, pale gums, breathing difficulty, or signs of severe dehydration. These warning signs can reflect bleeding, obstruction, or another emergency and should not wait for a routine visit.

Ask what tumour type was found, whether it appears removable, which staging checks are useful, how treatment could affect eating and comfort, and which changes should trigger an emergency visit. It is also reasonable to discuss pain relief, nausea control, nutrition, follow-up plans, and how quality of life will be monitored.