yep, fully agree!
As for the question of polish , I have quite a few different ones in bantam, but they would be your absolute worst pick for a broody bird, out of probably 60 or so hen, I've had one, (1) go broody for about 2 weeks!
I have the porcelains in d'anver, not d'uccle, I need to get...
I guess you see by now, any fluffy butt-ed bantam works great, should do well with any of them, By the way, yall must have tiny silkies, mine do 1/2 dozen large fowl/ducks or 12-15 bantams at the time , no problem