We live in a world of recycling, so I was thinking about how to build inexpensive breeding pens for breeding silkies. Here's my idea, and I am wondering where the holes are. Advertise on the online classifieds for baby cribbs that no longer meet the standards. wanted free for pick up. The Cribs are about 30" X60" which to me is big enough for a trio. The slats on the side are a couple of inches apart, so hand some eaves trough on the sides for feed and water. Instead of a matress a piece of plywood on the bottom. Silkies don't fly much, probably don't need tops. The sides often come off a crib that makes it easier for cleaning. The legs are high enough that birds can still live on the floor, and the cribs are on wheels which make the floor flocks easier to clean. Cribs come apart for storage. If people wanting to get rid of them don't have to pay the dump, it is a win/ win situation. So what do you think?