No, all late neuters are not aggresive as you described. My little 'Rocket Man" that I have now wasn't done till over 4 years old and is a kissy sweetheart. I have had several over the years and find that once neutered it takes a month or so for the hormones to completely settle down, and a coat change to get rid of the orange fur. They seem to lose that real bull dog appearance after a while and the body slims down. Pat [Posted in FML issue 4900]