vtguania, they are Rhode Island Reds, and yep, the tail feathers on that one are what have me concerned. I have a Buff Orpington rooster I'm trying to rehome now....2 if this RIR turns out to be a rooster too.
I have six pullets (or what I thought were). They are 17 weeks old and have started changing in just a couple of days, all in the head area of course. Is it possible not to know that you have a rooster until this late???
True, sometimes they wait till the last minute before all the traits show up. I also have 4 RIR. Three I'm pretty sure are hens the other one is iffy, they're about 10 weeks old now.