I bought one of them back some years ago now after seeing them at Blackpool dont have it now though,if you can imagine having a 3ft x 2ft box in the centre with just a v perch for the cock bird,on either side would be 2 hen boxes on top of 1 another each with a sliding door into the cocks section,basically you would let each hen in with the cock in turn and hopefully each hen would lay about the same time,there would be a nest bowl in each of the hens boxes,what you would need then would be some foster pairs that the eggs could be placed under.