Having the right cage for a canine friend is imperative. A cage or kennel is not simply a "containment device" for a dog, it's "home." Naturally, kennels are used as containment devices for pets while their owners are away from home or asleep. Nobody wants a dog howling all night because it's in too-tight quarters or because the kennel is too big and feels empty and alone. It should be a place where a pet shower is safe and comfortable.
It is imperative that the dog can stand upright in his kennel. He should not be forced to squat all day when his owner at work. Not only is this uncomfortable for the animal, it can lead to long term damage to the hips and legs. He should be able to turn around freely – most dogs have a "nesting" instinct, and will turn around several times before laying down to sleep.
Dogs are generally "clean" animals. They will not urinate or defecate where they sleep. When a dog is keneled, there should not be much spare room in the cage. The dog should be able to lie down and fit nose to tail from one end of the kennel to another. If there is room for a dog to run in a kennel, he has plenty of room to defecate in one end and sleep in the other. This makes house-training a dog significantly more difficult. If a dog is often left in too large a kennel for long amounts of time, it can become a "dirty dog", comfortable sleeping, rolling, and playing in its own feces. This habit is extremely hard to break.
Additionally, dogs are social creatures, sleeping piled up on each other. Having a kennel where he can rest with his back to the wall is comforting for a dog.
Buying a kennel for a puppy is difficult, as many owners do not want to pay for multiple cages as the dog grows. There are many cages that come with divider panels – these help limit the amount of space a puppy has to move around, while still allowing the owner to keep their pet in the same kennel from puppy hood to adulthood. Wild dogs often den in small spaces, including holes and dark caves. Too large of a sleeping space can be intimidating for a dog, and lead them to become nervous. A divider allows the dog's cage to grow with him, and keeps him comfortable through the many growth phases.
Simply put, a dog should be able to stand, turn, and lie down in his kennel. There should not be extra room, and a dog should never have to squat or ball up to fit into his home. The proper kennel will feel like home, not a punishment, and your dog will never have to worry about waking up on the wrong side of the bed.