Fabian is 21 months old. He stays in his pen all day long while we work. We have this one:
https://www.amazon.com/Richell-Conve...hell+dog+crate It's a fortress because he's a climber. ***Worth every penny for the peace of mind.*** We have it in a rectangular configuration. I come home at lunchtime everyday to walk him,let him pee, and give him some time out of his pen.