PetMD Seal

Colonic or Rectal Inflammation in Cats

4 min read



If your cat is dehydrated from chronic diarrhea, it will need to be hospitalized for intravenous rehydration. If the inflammation is sudden and severe, your veterinarian may have you withhold food for 24 to 48 hours, to allow your cat's colon to relax. Meanwhile, if chronic inflammation and scar tissue has formed in the colon, surgical removal of the most severely scarred segments may be required. Inflammation from a fungal infection may also require surgery.


Prescriptions for medications will be based on the cause of the inflammation. For example, if the inflammation is the result of whipworms or hookworms, anti-parasitic drugs will be prescribed. Anti-inflammatory and immunosuppressive drugs may be prescribed if the cause is an autoimmune reaction. Some types of colitis respond poorly to medical treatment; in these cases, surgery may be necessary. Consult your veterinarian as to your best option.


Home treatment will most likely be focused on diet. Your veterinarian may suggest a protein diet that is either prepared by you at home, or is a pre-packaged, store bought item. Supplementing with unfermented fiber, such as bran, may be used to increase fecal bulk, improve muscle contractions in the colon, and draw fecal water into the feces. On the other hand, some fermentable fibers may be beneficial. The fatty acids produced by the fermentation may help the colon heal and restore normal bacteria in the colon. Some fibers, such as psyllium, may act as laxatives, and may not be the best remedy for a condition that causes diarrhea, so it is important to consult with you veterinarian before beginning any course of treatment at home.


Living and Management


Your veterinarian will need to see your cat for follow-up exams, at least for a while. Some of these check-ups may be done over the phone, as you can describe your cat's progress to the doctor. If medications are prescribed, you will need to take care in following your veterinarian's full instructions.




To prevent recurrent inflammation of the colon and rectum, avoid exposure to other animals, contaminated foods, and moist environments. Avoid sudden changes in diet, as well. Repeated recurrences of inflammation can be expected when it is related to autoimmune conditions, though this is not always the case.



Related Articles

Colonic Ulcer in Cats

Histiocytic ulcerative colitis is an uncommon disease characterized by ulcers in the lining of the colon, and inflammation with periodic acid-Schiff...

Protrusion of the Rectum and Anus in Cats

Anal or rectal prolapse is a condition in which one or more layers of the cat's rectum are displaced. Learn more about the causes, symptoms and...

Constipation (Severe) in Cats

Cats with congenital megacolon, or severe constipation, lack normal smooth muscle function of the colon. Learn more about the symptoms and treatment...

Gallbladder and Bile Duct Inflammation in Cats

Inflammation of the gallbladder is often associated with obstruction and/or inflammation of the common bile duct and/or the liver or bile system,...