It's been a couple of years now--I wonder how the thread starter faired?
We just got 6 Polish crested this year ourselves, of which 5 remain, and I'm still waiting on the girls to start laying. We haven't had to separate them from the other chickens, though--everyone seems content to leave their crests alone, for which I'm glad. They make wonderful pet chickens for anyone who's wondering--not very bright but heaps of personality!