There are many factors that can cause cats to have blood in their stools, including: bacterial and viral infections, parasites, food intolerances or allergies or indigestion, non-cancerous polyps, stomach cancer, ingestion of rat poison, anal or lower intestinal tract infection Damage, blood clot disorders, intestinal obstruction or constipation, inflammatory bowel disease, etc. Sometimes bloody stool is just a sign that the cat is unwell. If it is also accompanied by some symptoms such as vomiting, diarrhea, etc., the cat should be taken to the hospital for examination immediately.

Diarrhea and vomiting caused by indigestion generally have little impact on the cat’s appetite. The color and smell of the feces are normal, but occasionally there will be pus and blood in the feces.

When a cat is constipated, the hard and dry stool may scratch the rectum or create a certain degree of anal fissure when the cat tries to pass it out, resulting in blood in the cat's stool. For this kind of relatively posterior bleeding position, when a cat has blood in his stool, most of the blood will be bright red and often adhere to the surface of the stool.

If there are too many parasites in the cat’s body, it will cause intestinal dysfunction, which may lead to diarrhea, bloody stools, etc. The stool that comes out is jelly-like, and the blood at the end of the stool appears dark red or brown.

Cats with blood in their stools caused by factors such as viral infection, non-cancerous polyps, gastric cancer, taking rat poison, intestinal obstruction, inflammatory bowel disease, etc. are more complicated and require prompt medical treatment.

Based on the above: If you suspect that the blood in your cat's stool is caused by a disease, please take your cat to the hospital for examination and treatment as soon as possible. If it is stress or occasional blood in the stool, it may not be a big problem. You can observe it at home and decide whether to go to the hospital based on the duration and frequency of the blood in the stool and the cat's condition.