I'm sorry I didn't get back to this thread. Three of my Polish started crowing, so I didn't have to worry about sexing them! Sold a few of the crowd to folks who wanted both roos and hens (a rare thing!), so my problems took care of themselves.
Behavior seems to show the remaining birds to...
At what age do Polish typically develop wattles? I have a dozen 13-week old assorted Polish. One buff-laced and one white-crested-black have had large bright red wattles and combs from a young age and they now have the spiky rock-star crests of roos.
None of the others have the slightest sign...