We put a pen in our basement for our dogs. Over the years, it's been great for us. If you're trying to potty train a dog, being confined to the very small space of a crate can be helpful. If the dog is already potty trained, but could be destructive if loose in a house, a pen can give them more room to move around in and stretch their legs, while keeping them and the house safe. It's kind of nice not to have large or multiple crates sitting around in the main living area, too. When I say, "Let's go to bed!" the dogs run downstairs to the pen.
