Puppies and grown dogs alike, a dog cage can be a useful dog training tool for just about any age dog. Dogs naturally crave shelter even indoors, they will think it is within table, chair or bed, almost anywhere that can make them feel safe and secure. By giving your dog cage for your dog you are giving them the safety they want inside a safe clean environment that you control. Dogs naturally avoid soling their "den" by putting your pup into a cage you're promoting them to hold their bladder until they're within an appropriate area. After dogs reach maturity from 3-6 months, they gain the opportunity to hold their bladder and toilet training becomes more possible.