A crate can be a comforting thing for a dog, much like a den. My rescued adult, Maddie, is currently resting in hers right now, with the door open! We feed her in her crate, keep nice toys/chew bones in there, and a comfortable bed (although with a puppy, I'd take out the bed - it will get peed/pooped/chewed on). She gets plenty of outside-the-crate time, but she likes it in there when resting. Crating makes housetraining go much faster, as dogs normally like to keep their living space clean (make sure the crate is small enough, so they can't pee/poop on one end and sleep on the other; many crates come with a divider to be able to adjust the size).