Chronic Vomiting in Cats: Welfare and Diagnosis 2026

Chronic vomiting in cats is a common but often under-investigated welfare concern that may signal serious underlying conditions.

Key Facts

Chronic vomiting is defined as vomiting occurring more than once a week for three or more weeks
Common causes include inflammatory bowel disease (IBD), small cell lymphoma, and hyperthyroidism
Many owners accept chronic vomiting as normal feline behaviour, delaying diagnosis
Diagnostic workup typically includes blood tests, ultrasound, and endoscopy or surgical biopsy
Small cell lymphoma is often treatable with oral chemotherapy and carries a good prognosis when caught early

Welfare Considerations

Chronic vomiting causes significant welfare compromise in cats, including nausea, discomfort, weight loss, and nutritional deficiency. The chronic and intermittent nature of signs means many cats suffer for months before being presented to a vet. Owner education about the difference between occasional vomiting and a clinically significant pattern is a key welfare intervention. Early investigation and diagnosis of the underlying cause allows targeted treatment that substantially improves quality of life.

What You Can Do

Keep a diary of your cat vomiting episodes and share this with your vet
Seek veterinary investigation if your cat vomits more than once a week for several weeks
Advocate for blood testing and ultrasound as early diagnostic steps rather than diet trials alone
Support feline medicine research into inflammatory bowel disease and small cell lymphoma