Just like their wolf ancestors, the domestic dog has the instinct to be in an enclosed place when resting. It feels safe and secure. We don't hesitate to give dog houses to our outdoor dogs, a crate is simply an indoor dog house.
Most dogs love their crates if used from an early age.
They'll seek out their crate for naps and security. There are many reasons to add a crate to your list of necessary dog supplies. Number one on the list is usually potty training. Using a crate makes housebreaking much easier for both you and your dog. Traveling is safer for everyone when a wire crate is used.