I haven't seen any drawbacks to this method and it works like a charm. When I have a Cochin go broody, I simply put her in the Silkie pen for a week. Then I return them to the Cochin pen and no more sitting. Voila, instant cure! The Silkies are so docile so there are never pecking order squabbles, although the Silkie cockerels do lavish their affections on the Cochin girls. Since they are the newcomers, the Cochins don't pick on the Silkies either.