Finding the Right Crate
Select a crate that's large enough for your dog to turn around, stand up, or lie down comfortably in. If he's a puppy, get a crate for the adult size dog so that he can grow into it.
Some crates are better than others in strength and ease of assembly. You can get crates in wire mesh-type material, cloth mesh, or plastic. Most are designed for probability and are easy to assemble. Our own preference for durability and versatility is a wire mesh crate. Wire mesh crates are easy to collapse, although they're heavier than crates made out of cloth mesh or plastic.
We recommend a good quality crate that collapses easily and is portable so that you can take it with you when traveling with your dog. If you frequently take your dog with you in the car, consider getting two crates, one for the house and one for the car. Doing so saves you from having to lug one back and forth.
Coaxing Your Dog Into the Crate In order to coax you puppy into the crate, use these helpful hints:
Set up the crate and let your dog investigate it. (Put a crate pad or blanket in the it.)
Choose a command, such as "Crate" or "Go to bed." (If your puppy isn't lured in, physically place him in the crate, using the command you've chosen.)
Close the door, and tell him what a great puppy he is, give him a intensive treat and then let him out. (There's no rule against gentle persuasion to get your pup enthused about his crate.)
Use a treat to coax him into the crate. (If he doesn't follow the treat, physically place him in the crate and then give him the treat.)
Again, close the door, tell him what a great little puppy he is, and give him another bite-sized treat.
Let him out.
Continue using the command and giving him a treat after he's in the crate until he goes into the crate with almost no help from you.
For the puppy that's afraid of the crate, use his meals to overcome his fear. First, let him eat his meal in front of the crate, and then place his next meal just inside the crate. Put each successive meal a little farther into the crate until he's completely inside and no longer reluctant to enter.
This is an excerpt from "Dog Training for Dummies"