Okay, Rambo has eaten meds about a week. There is no blood in his pee anymore.When we took the pee sample to vet they said that i have to call them tomorrow. So i called them about half an hour ago, and they said that he has urolithiasis (some stones in his pee) :( . So we have to go back to vet on monday to get right food for him, and to get another medication (?) .