Answer remains the same LOL That's the trouble with being a dog person, every animal is a dog. Only hours later did I think , hang on, was it a cat? Yes, being aggressive, anti-social, a fighter, may well prove to be behaviour and a characteristic which doesn't disappear on castration, because the animal has learned to live and respond that way or may have it innate , the character it was born with .Let's face it, you'll see often one kitten (or one pup) in a litter, which is always the most pushy, challenging, 'get out of my way' one at the teat, and ever after. The testosterone just gives it another motive !