Mate, is a good question and for me probably more than i am proud of. As a young bloke i had a few pups start early, matured quickly and were cracking one out dogs at a young age, so of course that set the benchmark of what i expected and at what age for future upcoming pups. So if dogs weren't doing what these dogs were by a certain age, they'd either be given to mates as pets/farm dogs or sold on. Of course looking back you see all the mistakes that you made in not giving them time, and the realization that one training method is not applicable to all dogs, and dogs learn in different ways /