I just read 'someplace' that Polish were difficult in some way to raise. Of course it was a blurb and did not say why the breed was difficult. I have 4 Polish and at 4 weeks seem extremely healthy and active. Is there some problems or special needs that polish have? These birds have a strong personality and I would like to keep them healthy. I live in N.C., and the climate is moderate, but at times the mountain can get cool.