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 .