I'm so sorry to hear that Romeo is so sick. When I adopted Storm from the Humane Society he had a bad case of an URI and some other things as well. One was coccidia. He wasn't having diarrhea like your Romeo but he did have blood in his stool. I gave him his meds and he made a full recovery. He's now a very happy and healthy 7 year old. I'm sure that with the meds and your great care that Romeo will be back to normal in no time. Prayers are on the way for a full and speedy recovery. Please take care.