Hello, everyone. I've been agonizing over this issue for a couple of weeks now! I have two 8 or 9 week old production reds (sold to me as RIR by the way). Some of the physical signs of roosterhood have developed in one such as black, shiny feathers around the neck and a more developed comb and wattle. She's only slightly larger than her sister. I bought hese two chicks for one of my hens who keeps going broody on me. She's an amzing foster mom. Long story short: how much weighr does behavior carry when trying to determine the sex of production reds? This guy/girl acts EXACTLY like the clutch-mate (is that a word?). Absolutely no roo behavior. I dont have pics right now but i will try to get some posted. Im perplexed! Any ideas? Thanks in advance!