My FIV cat has chronic bloody diarrhea. What's the cause & help?
Hello, sorry to hear about Greg. GI signs in cats can be caused by infections, ingestion of foreign material and less likely by a dietary indiscretion (cats don't often eat other types of food they should not). Other common causes in middle or older cats include inflammatory bowel disease IBD or even GI lymphoma in older cats.
With Greg having FIV, he is even at more risk of developing infections or other diseases such as IBD. He would require further diagnostics (in addition to blood and urine tests) to confirm these. It may include stool samples and an abdominal ultrasound. Even more, GI biopsies may be recommended if your veterinarian suspects that Greg may have IBD or GI lymphoma.
You may try however, offering Greg a bland diet in case this is consistent with a dietary indiscretion. The bland diet could consist of plain white rice, skinless and boneless boiled chicken, and/or low fat cottage cheese. If these help then perhaps Greg may have a dietary indiscretion and will be ok within a few days.
However, if he does not improve, has persistent diarrhea, develops a decreased appetite, lethargy, or vomiting then he should be seen by his veterinarian sooner. Hope this helps and best of luck.
Updated on September 23rd, 2025