When the cat's eyes and glass, fever, and will not respond to you as usual, there may be a need for medication for the infection, which affected more than necessary, or other diseases that require immediate attention. Cat has ingested a foreign body or toxins.
If you find blood in the stool of the cat may or may not be something life threatening. It can be as simple as constipation.
It can also cause blood in the stool of the cat be caused by inflammation of the colon or bowel inflammation.
Another factor could be blood in the stool of the cat's stress.
You may also want to supplement their diet with something that contain vitamins or herbal remedies that will help keep the immune system and digestive system healthy, thus helping to fight infections and reduce stress.