Ive been told that the male gsd is more territorial and aggressive than the female is there any truth in this? Im going to meet a 4yr old male on Sunday, hes been brought up with kids but obviously its always a bit of a worry when you think of bringing such a large adult dog into a home of 4 kids and 2 young labradors. Is there anything i can look out for when meeting him? Opinions on differences between male and female personalities please too!! Thank you!!