Hi Dixieland,
I've definitely heard of this happening. Unfortunately it's not uncommon. My Scooter had a severe UTI just recently, but not to the point where he was blocked. He was straining with blood in the urine, and was crying and licking his rear end a lot. After trying antibiotics to clear it up, the vet put him in a prescription cat food that will hopefully clear the problem up and keep it that way. He has to be on it for the rest of his life, but as long as it helps to prevent a recurrance it's worth it even though the food is a little expensive. He's on the Hill's Science Diet for urinary tract. Your vet should be able to give you the prescription for it. So far Scooter seems to have improved **hugs** to your poor baby. I know it's so uncomfortable for the poor little kitties! Be sure to let us know how he is doing