Figure 1.

(a) Fecal occult blood test kit (Hemoccult Single Slides; Beckman Coulter). Test card on the left demonstrates positive and negative controls in orange box, as well as positive results, indicated by the blue color in the test windows. Test card on the right demonstrates positive and negative controls in orange box, as well as negative results, indicated by the lack of blue color in the test windows. (b) Normal feline feces while on the APF diet (Royal Canin Veterinary Diet). (c) Melenic feces and (d) comparison of feces before and after blood dosing at 45 mg/kg