just wash it off and yu should be fine. urea is just unabsorbed minerals and vitamins with water. yes it is piss, but it ain't gonna kill ya and as long you clean it goo and cook it right. but if your really parinoid about the fact your digestine trace amounts of buckys piss i'd do what bassman said and just trim it out. ooh ya congrates and thank you for keeping these furry creatures in check