Answer

Hello,

Bleeding from the rectum can be caused by various reasons. It's possible that your cat ingested a non-food item and this is causing irritation and bleeding in her intestinal tract. The presence of intestinal parasites can cause blood in the stool, and/or bleeding from the rectum. You can see more information about this symptom, here:

http://www.petplace.com/cats/hematochezia-blood-in-stool-in-cats/page1.aspx

If your cat is bleeding consistently, she needs to be evaluated by a vet, immediately, to find the cause and have it treated. If you just see a blood spot where she sits, but she's not actively bleeding constantly, she may have an irritation/sore on her anus, or the blood may be coming from her vulva, indicating a urinary tract infection.

I hope you're able to have your cat assessed and treated by the vet, as soon as possible, and all will be well.

Cher