CATS · Condition guide
Inflammatory bowel disease in cats: real cases
Chronic vomiting that owners often dismiss as "normal cat" behaviour is, in published case series, frequently inflammatory bowel disease. IBD in cats overlaps closely with low-grade alimentary lymphoma — the two can be impossible to tell apart on routine workup, and biopsies (often full-thickness via laparotomy) are the gold standard to differentiate them.
Treatment for confirmed IBD is a stepped approach: a strict diet trial, sometimes a B12 deficiency to correct, then prednisolone, and chlorambucil or cyclosporine for refractory cases. Most cats do well long-term. The key is taking chronic vomiting seriously rather than waiting until weight loss makes it impossible to ignore.
What vets typically check for
- CBC + chemistry + total T4 + fPLI + B12/folate + abdominal ultrasound.
- Strict 8-week hydrolyzed-protein or novel-protein diet trial.
- B12 (cobalamin) supplementation if deficient — common in feline IBD.
- Endoscopic or laparoscopic full-thickness biopsy to confirm IBD vs. alimentary lymphoma.
- Treatment: prednisolone +/- chlorambucil; chronic management with diet and B12.
Not a replacement for veterinary care. Use this to walk into the conversation prepared, not to self-diagnose.
Real cases from the veterinary literature
Peer-reviewed reports our semantic search surfaces for Inflammatory bowel disease in cats. Click into any case for the full abstract — or run a personalised search with your pet's exact details.
- A psyllium-supplemented gastrointestinal diet is effective for the management of chronic constipation in cats: a 6-month controlled clinical trial.
Journal of feline medicine and surgery · 2026 · France
A group of cats with chronic constipation was given a special diet enriched with 6% psyllium to see if it would help their symptoms. Over six months, the cats on the psyllium diet showed significant improvements in stool consistency and had fewer issues with constipation compared to those on a regular diet with only 0.5% psyllium. While many cats on the regular diet experienced
- Correlation between serum cobalamin concentration, histopathologic changes, and outcome in cats with chronic enteropathy.
Journal of veterinary internal medicine · 2026 · United States
A group of 73 cats with chronic enteropathy (CE), which can cause digestive issues, were studied to see if low vitamin B12 (cobalamin) levels were linked to intestinal damage. The results showed that most cats with low cobalamin had some level of intestinal damage, but the vitamin levels didn't predict how severe the damage was or how well the cats would do overall. This means
- EXPRESS: Gastrointestinal microbiota and fecal fatty acids in cats with exocrine pancreatic insufficiency.
Journal of feline medicine and surgery · 2026 · United States
A group of 55 cats with exocrine pancreatic insufficiency (EPI) showed symptoms like weight loss and changes in appetite. Researchers found that these cats had abnormal gut bacteria and fatty acids in their feces compared to healthy cats. The study revealed that the EPI cats had higher levels of certain fatty acids and a different balance of gut bacteria. Understanding these di
- Use of polyethylene glycolelectrolyte solution (GoLYTELY) for management of acute fecal impaction and chronic constipation in a cat.
The Canadian veterinary journal = La revue veterinaire canadienne · 2026 · United States
A 13-year-old spayed female domestic shorthair cat was brought to the vet because she had severe fecal impaction after recent surgery. Traditional treatments didn't work, so the vet started her on a polyethylene glycol-electrolyte solution (GoLYTELY) through an esophageal feeding tube, which quickly resolved the impaction. Unfortunately, she returned 23 days later with chronic
- Systemic Effects of Ocular Instillation of 0.4% Ketorolac Trometamol and Luminol-Based Detection of Fecal Occult Blood in Healthy Cats.
Veterinary ophthalmology · 2026 · Brazil
A group of healthy cats received eye drops containing 0.4% ketorolac trometamol three times a day for 15 days to see if it affected their health. By the end of the study, the cats showed some changes in their blood tests, including higher cholesterol and lower potassium levels, but these were still within normal ranges. However, 10 out of 12 cats tested positive for hidden bloo
- Development and utilization of a multiplex PCR assay for detecting three feline enteroviruses.
Molecular biology reports · 2025 · China
A study found that a new test can quickly detect three different viruses that cause diarrhea in cats. Feline diarrhea often shows up as watery stools, and the most common cause is the feline panleukopenia virus (FPV). The new test can identify FPV, feline kobuvirus (FKoV), and feline norovirus (FNoV) in cat samples, making it easier for vets to diagnose and treat affected cats.
Frequently asked questions
- Isn't it normal for cats to throw up?
- Vomiting more than once or twice a month is not normal. Published studies consistently find that cats with "occasional vomiting" frequently have IBD or low-grade alimentary lymphoma on biopsy. Take chronic vomiting seriously.
- How do vets tell IBD from lymphoma?
- Only on biopsy and often with additional immunohistochemistry or clonality testing (PARR). Endoscopic samples are sometimes too superficial to make the distinction — full-thickness surgical biopsies are increasingly preferred when imaging suggests transmural disease.
- Will steroids fix it?
- Often yes — most IBD cats respond well to prednisolone, though long-term steroid use brings its own issues (diabetes risk, hair coat changes). The goal is to find the lowest effective dose, ideally combined with dietary control.