This is a common condition which can occur in young male cats, in which they become unable to urinate. It is a life-threatening condition which can progress rapidly to death, and is important for owners of male cats to know about! Charlie came to us this weekend because he was blocked. Fortunately, Charlie is doing well and went home yesterday. If you notice any straining to urinate, discomfort in the abdomen, vomiting, or excessive meowing in your kitty, seek medical attention immediately!