The first dog training book I ever read, back in the mid 1980s, was the Monks of New Skete book and I took their (now scorned) alpha rolling advice to heart. And you know what, the first few Rottweilers I had were alpha-rolled and whupped in Come To Jesus meetings for serious transgressions, and they were dogs I could take absolutely anywhere, no leash, with 100 percent confidence. I simply expected they would do as directed, and they did. Then I got derailed by the "science" of purely positive training and all that and had a couple of hard Rottweilers who were assholes and stuffing hot dogs up their noses really had no effect. Maybe I wasn't doing it right, but it was a fail. So I went back to prong collar and zero treats and zero cajoling, and that really worked. Constant nagging is unfair, I think. Say what you mean and mean what you say. Dogs get that. They get frustrated, I think, by nagging and cajoling and poorly-timed treats, and a solid dog is not ruined by hard corrections if they are fairly administered. Dogs are incredibly honest animals and we do them a disservice when we are not honest with them in return. Little leash tugs are not honest, milketoast rewards are not honest, treats for ten seconds of desired behaviour is not honest. Watch an older dog properly discipline a puppy: scary, brief, with serious intent. A good puppy gets that and won't re-offend; they get respectful really quick. Now it's been a while since I have had a hard dog, all three of my current ones would be crushed and stressed by a hard correction plus it would just be unecessary and overkill and unkind to them. But were I ever to have a hard dog again? I'd alpha-roll and hang a dog to make the point that I am not effing around in a heartbeat if necessary. It worked for me, and my early dogs (and working farm dogs I grew up with) were the most rock-solid dogs I've known. Devoted, happy and hard-working, because they clearly understood their boundaries.