Thanks for posting pics of what your hubby built you Mumsy...I was just about to post a question about the breeding pen size that's needed for Silkies. I have a project under way, a 3-story stack of 3'x4' (x2.5' tall) cages built into a corner that will be used for keet brooders for now, that I'm planning on using eventually for Silkie breeding pens later on once my Silkie flock matures more. I was worried the size wouldn't be big enough for breeding cages/pens, but going by what your hubby built you it looks like what I have in the works should work well enough, maybe even for trios. I'm using an old existing crooked shed that was here before I bought this place... and nothing on/in it is square or level (kinda fits my building skills tho), lol, so I'm having to do extra work to get everything to fit, line up and look ok. It'll be functional and user friendly when I'm done, tho most likely not a thing of beauty.