My two cents ,dogs i dont like, ,LABs black ones always ill especially if mixed ,Pits they have a use hog hunting, Pyrennes Roam alot gotta be behind electric fence or they will be at your neighbours, I think its my opinion that you cant tell a Mental dog until it s bout a year old ,and the high bred dogs just have issues ,In my job i see lotsa dogs good and bad ,when people dont use the dog in a way that the dog is bred thats where the dogs get bored and develop issues ,Labs i see wouldnt know what a duck is all they are being used as a watchdog, pyrennes gaurding one goat dont work so they take to wandering ,And Pits no kidding our selves what is a pit bred for Grabbing something and holding on .
As part of job, I encounter lots of people that use dogs around farm. Most dogs used in some sort of guarding capacity though some used for herding. Farmers I deal with, mostly, have little time for hunting and when they do, they are not using dogs. The consensus is that dogs do not mature mentally until about two regardless of breed. With hounds I do remember Walkers would settle into their job much faster than Black and Tans but the final product of the latter we generally liked better if it was a good dog.