Boys often have an unrealistic expectation of being a pup. They think it's going to be easy for them, that they'll find a man to take care of them and give them a life they always wanted, that they'll be owned and loved. They don't know the first thing about being a pup is absolute submission, giving their absolute loyalty to their owner with their mind entirely devoted to servitude.
The first step is acclimating them to your scent. If they want to be good boys and get their bones, they need to get used to the smell and taste of their master no matter how rank. They need to be tied up before you lock your shoe around their face. By nature, they'll try to resist when they feel their mind starting to succumb to the flavor of the shoe, leaving them to struggle against the binds. Soon they won't be able to get enough of the stench, wanting nothing more than to exist in the fumes assaulting their nose. You'll find them in a state of bliss, obediently breathing lungfuls from the boot.
Their minds will be almost decimated at this point, unable to live without your scent like oxygen. You'll need to provide them with spent socks and underwear for them to chew on, saturating their minds with your stale musk waiting for you to come home. They'll want nothing more than to bathe in your fluids, anything their body can absorb. That will be their reward for when they follow your orders, forcing them to walk on all fours, heel to you when you command them.
Train them well and they will be absolutely devoted, never capable of thinking or acting individually again. They'll be ecstatic when you put a locked chain around them, a permanent collar that'll never come off, a symbol of their utter servitude. You'll become the alpha of their world, and they no longer need to think about themselves, just like they always wanted.