I taught AJ the command "Bite."
Some folks here will say, "What the devil for???"
When I give him a little piece of something soft, like chicken meat or a piece of beef, I don't want him trying to snatch or pull the whole thing out of my hand. Therefore, I taught him to take it little bite by little bite with his front teeth.
His previous owner already gave a good basis for this by teaching him to have a very soft mouth, so I merely built on what she already did. So now, when I offer him something he really likes, I tell him, "Bite." and he takes a little nibble off the end of it.
The purpose is twofold: it keeps him from the possibility of choking on something because he tried to swallow it whole and I don't have to spend a bunch of time cutting things up.
Interestingly, previous owner also taught him the command "Chew it." If he is given something and this command at the same time, he will take the time to chew it up rather than just swallow it.
We all have such smart dogs!