Ya might check Gqf"s website they sell breeding cages for bobs when you look at their 3 compartment cages remember to divide by 3 to get the width of the individual pen
Pairs Will Do Ok In 2x2. Keep In Mind Hens Rule The Roost With Bobs, Its Not Unheard Of To Have A Bob Divorce And They Can Get Ugly Fast... There's Even The Occaisional Black Widow Hen (pure Evil In Carnate Wrapped In Feathers) Close Observation Is Necessary Throughout Their Life Span.... Never Know When The Divorce Flag Will Pop Up