The Petmedica Stool Blood Test is an advanced home test to detect occult (hidden) blood in the stools of dogs and cats. The test employs a combination of monoclonal and polyclonal antibodies to selectively identify occult blood in pet stool samples with a high degree of sensitivity. Occult blood as low as 10 ng/ml can be detected. Blood in the stool-which is usually hidden and unseen by the naked eye- is one of the early warning signals of many health problems in dogs and cats. Blood in the stool can be caused by bleeding ulcers, hemorrhoids, polyps, colitis, diverticulitis, fissures or cancer of the colon. If hidden blood is detected, a veterinary check-up is recommended. Easy to use Safe and Clean Results in Five Minutes Reliable and Accurate One test per box