My litter of puppies is now 6 weeks and I just moved their play pen from the living room to the "dog loft" (family room) 2 days ago.
This morning, I let them out of the pen so they can run around and play with rest of the pack.
When I came back 1/2 hours later, I found Thomas BACK IN THE PLAYPEN!!!!
The playpen is only 1 foot high, but the funniest part is that they haven't try to get out of it yet!!!
The 3 other pups where sleeping next to him but outside of the pen. Like they want to go back in it too!
Look like they really like their playpen and feel safe there!