We had to put our one year old kitty to sleep Monday & am still all torn up over it. We had the kidneys sent off to be tested, but in the meantime, I'm trying to understand what happened for my own peace of mind. He got a cold from one of our other cats & then a week later, he was vomiting. The next day, his blood test showed BUN 130, Creat 13.5, & Phosph 9.78. They pumped various levels of fluids in him throughout the weekend but he wouldn't pee. Monday, they did an ultrasound & told us there was no blood flow in his right kidney & limited blood flow in his left kidney. His BUN had increased to 240, & Creat to 19. Has anyone heard of this before? My vet said it's unusual for there to be no blood flow & for this to happen so quick like this. Any ideas? Thanks.