Crate training takes some time and effort, but it is a proven way to help train dogs who act inappropriately without knowing any better. If you have a new dog or puppy, you can use the crate to limit his access to the house until he learns all the house rules—like what he can and can't chew on and where he can and can't eliminate. A crate is also a safe way of transporting your dog in the car or taking him places where he may not be welcome to run freely. If you properly train your dog to use the crate, he'll think of it as his safe place and will be happy to spend time there when needed. 

Selecting a Crate 

Crates may be plastic (often called "flight kennels"). They come in different sizes and can be purchased at most pet supply stores (walmart has the best prices). Your dog's crate should be just large enough for him to stand up and turn around in. If your dog is still growing, choose a crate size that will accommodate his adult size. Block off the excess crate space so your dog can't eliminate at one end and retreat to the other. 

The Crate Training Process 

Crate training can take days or weeks, depending on your dog's age, temperament, and past experiences. It's important to keep two things in mind while crate training: The crate should always be associated with something pleasant, and training should take place in a series of small steps. Don't go too fast. 

Step 1: Introducing Your Dog to the Crate

Place the crate in an area of your house where the family spends a lot of time, such as the family room. Put a soft blanket or towel in the crate. Bring your dog over to the crate and talk to him in a happy tone of voice. Make sure the crate door is open and secured so that it won't hit your dog and frighten him. 

To encourage your dog to enter the crate, drop some small food treats nearby, then just inside the door, and finally, all the way inside the crate. If he refuses to go all the way in at first, that's okay;  Continue tossing treats into the crate until your dog will walk calmly all the way into the crate to get the food. If he isn't interested in treats, try tossing a favorite toy in the crate. This step may take a few minutes or as long as several days so you don't want to wait several days, you need him in there now.. If he refuses to go after a few tries it is OK to force him to enter, then give a treat.

Step 2: Feeding Your Dog His Meals in the Crate

After introducing your dog to the crate, begin feeding him his regular meals near the crate. This will create a pleasant association with the crate. If your dog is readily entering the crate when you begin Step 2, place the food dish in the front after the pup has entered.. 

Once your pup is done eating, remove the food, wait about 20 minutes and then take him out potty.  If he does whine or cry in the crate, it's imperative that you not let him out until he stops. Otherwise, he'll learn that the way to get out of the crate is to whine, so he'll keep doing it.

Step 3: Conditioning Your Dog to the Crate for Longer Time Periods
 

After your dog is eating his regular meals in the crate with no sign of fear or anxiety, you can confine him there for short time periods while you're home. Call him over to the crate and give him a treat. Give him a command to enter, such as "kennel." Encourage him by pointing to the inside of the crate with a treat in your hand. After your dog enters the crate, praise him, give him the treat, and close the door. Sit quietly near the crate for five to ten minutes and then go into another room for a few minutes. Return, sit quietly again for a short time, then let him out of the crate. 

Repeat this process several times a day. With each repetition, gradually increase the length of time you leave him in the crate and the length of time you're out of his sight. Once your dog will stay quietly in the crate for about 30 minutes with you out of sight the majority of the time, you can begin leaving him crated when you're gone for short time periods and/or letting him sleep there at night. This may take several days or several weeks.

Step 4, Part A: Crating Your Dog When Left Alone
 

After your dog can spend about 30 minutes in the crate without becoming anxious or afraid, you can begin leaving him crated for short periods when you leave the house. Put him in the crate using your regular command and a treat. You might also want to leave him with a few safe toys in the crate. You'll want to vary at what point in your "getting ready to leave" routine you put your dog in the crate. Although he shouldn't be crated for a long time before you leave, you can crate him anywhere from five to 20 minutes prior to leaving. 

Don't make your departures emotional and prolonged, but matter-of-fact. Praise your dog briefly, give him a treat for entering the crate, and then leave quietly. When you return home, don't reward your dog for excited behavior by responding to him in an excited, enthusiastic way. Keep arrivals low key to avoid increasing his anxiety over when you will return. Continue to crate your dog for short periods from time to time when you're home so he doesn't associate crating with being left alone.

Step 4, Part B: Crating Your Dog at Night 
 

Put your dog in the crate using your regular command and a treat. Initially, it may be a good idea to put the crate in your bedroom especially if you have a puppy. Puppies often need to go outside to eliminate during the night, and you'll want to be able to hear your puppy when he whines to be let outside.

Older dogs, too, should initially be kept nearby so that they don't associate the crate with social isolation. Once your dog is sleeping comfortably through the night with his crate near you, you can begin to gradually move it to the location you prefer, although time spent with your dog—even sleep time—is a chance to strengthen the bond between you and your pet.

Potential Problems
 

Too Much Time In The Crate. A crate isn't a magical solution. If not used correctly, a dog can feel trapped and frustrated. For example, if your dog is crated all day while you're at work and then crated again all night, he's spending too much time in too small a space. Other arrangements should be made to meet his physical and emotional needs. Also remember that puppies under six months of age shouldn't stay in a crate for more than three or four hours at a time. They can't control their bladders and bowels for longer periods. 

Whining.

If your dog whines or cries while in the crate at night, it may be difficult to decide whether he's whining to be let out of the crate, or whether he needs to be let outside to eliminate. If you've followed the training procedures outlined above, then your dog hasn't been rewarded for whining in the past by being released from his crate. If that is the case, try to ignore the whining. If your dog is just testing you, he'll probably stop whining soon. Yelling at him or pounding on the crate will only make things worse. 

If the whining continues after you've ignored him for several minutes, use the phrase he associates with going outside to eliminate. If he responds and becomes excited, take him outside. This should be a trip with a purpose, not play time. If you're convinced that your dog doesn't need to eliminate, the best response is to ignore him until he stops whining. Don't give in; if you do, you'll teach your dog to whine loud and long to get what he wants. If you've progressed gradually through the training steps and haven't done too much too fast, you'll be less likely to encounter this problem. If the problem becomes unmanageable, you may need to start the crate training process over again. 
 

Separation Anxiety. Attempting to use the crate as a remedy for separation anxiety won't solve the problem. A crate may prevent your dog from being destructive, but he may injure himself in an attempt to escape from the crate. Separation anxiety problems can only be resolved with counter-conditioning and desensitization procedures. You may want to consult a professional animal-behavior specialist for help.