Ahh yes but manufacturers do use scientists. And I still stand by my comments. I know that I agree with everything you say, but I am not explaining it in a way that you understand that, I, understand what you are saying. Yep Ive seen dog-aggressive dogs. My ex had one. She was genetically that way. I did not realise this until I met her mother. Both of them reacted to most dogs without warning, without reason, any all kinds of environments and situations. Blade's mother, like I mentioned waaay above, was eeeeeextreeeeeeemelyyyyyyyyy dog aggressive, for no apparent reason and she snapped in miliseconds. At a show, surrounded by other dogs, she was generally wound up, highly strung, but for some reason she spotted some dog she had never met, way way across the show grounds, past heaps of other dogs, and she bloody went at her. That dog had no idea Blade's mum even existed til they were in the middle of a full on scrap. I have worked with a lot of dogs - in breeding, vet nursing, and kennels. I do believe I can read even very subtle signs in dog behaviour so I do understand what dog-dog aggression is like. I do agree that it is how theyre wired. I do agree there doesnt [to us?] seem to be any 'why' theyre like that.