In my mix of chickens, I do have one polish crested and it is noticeably smaller than the others (although I also have one banty who is a shortie, but kind of chunky). I'm actually wondering if the polish will get big enough to stay contained in our fencing -- we went with 2x4 wire rather than chicken wire for rigidity. There's also a couple real odd looking ones, kind of brown and white splotched (not in a real attractive way to my mind), that are tending toward the skinny side. Guess I'll have to wait and see, I haven't yet let them outside, although they are certainly chomping at the bit to see what's outside their current universe.
