A dog cage, also known as a dog crate, is a confined space designed to safely house dogs. It provides a secure environment for pets, helping with training, travel, and creating a personal space for them. Dog cages come in various sizes and materials, including metal, plastic, and fabric, to accommodate different breeds and preferences. Using a dog cage can help with housebreaking and preventing destructive behavior when the owner is away. It is important to choose the right size, allowing the dog to stand, turn around, and lie down comfortably. Proper introduction and positive reinforcement can make the cage a safe haven for the dog.