trapping - my DH built me a rolling breeder/broody pen over this past winter, and I love that thing for trap nests! It's 4' x 3', up on stilts with wheels at one end so I can wheel it right out of the barn and even wheel it directly into the run the hen belongs in. It has a nest in one corner, and I use feed cups to hang off the wire sides for water/feed. I love that thing! It also works awesome as a broody buster - I just put a small feed bucket into the nest box so the broody doesn't have access to it, leave her in for 3 days, and she's busted! When using for trap nests, I simply wheel it into the run, put the hens I'm wishing to separate eggs from in it for the day, and when I've collected their eggs, they can return to the run & their buddies for the day.