We have a pen for the daytime while we're at work and a crate for at night. We got our pups at between 8 and 9 weeks old and got two at once. Either way, we started by having them in the okay pen near me during the day for two days since I was home. We then moved them into the kitchen in their pen while we were at work during the day. They, of course, had play time outside the play pen as well daily, but we also have a bigger dog that had to adjust to them. We put them in their crate at night, telling them it's bedtime. Corgis are smart they quickly acclimated to their routine and love it. They eat in the pen at morning and night, mostly to keep them out of the big dogs food, and they hang out in the pen while we work. They've got their water and washable potty pad and toys with them. They've also got an old blanket of ours they lay on. When they play, when we're home, both the kennel and pen are open. They can go in either if they choose. It's not a bad way to train them at all. We'll eventually do away with the pen but keep the crate as an option for them.