Cochin hens work very well too. Mine go broody just as much as the silkies, and they can cover way more eggs. So if you are looking for the most bang for the buck so to speak that would be a better option that the silkies IMO if you are just using them to incubate eggs. For example I had a cochin hen sit on 18 muscovy eggs, 16 of which hatched, plus she was a wonderful mother to them.