Michele, it would help to know how many birds you plan to use in each breeding pen. I know John has posted photos of his in the past, so I suspect he will jump in here with some advice. Personally, I use different size pens depending on the number of birds, from a single pair to a mating of one male with six or more females. John rotates males, and I seldom do. I like to use hanging feeders in the bigger pens.