Oh, the eternal poultry puzzle. You raise a flock of Seramas, watch them scratch and peep, and somewhere around week five, the universe decides to mess with your head. This Reddit user posted a familiar scene: five chicks that looked like hens, one that looked like a roo, and then, right on schedule, the combs started popping up like tiny, traitorous crowns. Now three of the presumed hens are sporting that telltale red. The far left one is a whole size category ahead. Is it a hen? A roo? A very confused dinosaur? Welcome to the most egg-citing guessing game in backyard chicken keeping.
Here is our honest, slightly ruffled take. You cannot trust feather development alone at this age. That strategy worked for exactly three and a half weeks before the combs decided to stage a coup. The user noticed that three of the "hen-feathered" chicks suddenly grew combs at four weeks. That is the moment the roo clues start showing up, even in breeds where the boys are supposed to be more subtle. Seramas are tricky because they are small, slow to mature, and their secondary sex characteristics can be delayed or ambiguous. A comb at four weeks is a strong hint, but it is not a conviction. The bigger chick on the far left? That could be a dominant hen or a roo who is simply eating his Wheaties. Size alone is not a reliable tell in a breed where females can be quite hefty compared to their brothers.
What we would tell a reader who brought this to us is simple: wait. Yes, waiting is the least satisfying advice in the world. You want answers now. You want to name that chick Gerald or Gertrude and move on with your life. But at five weeks, you are still in the murky zone where even experienced keepers get it wrong. The surest signs, pointed saddle feathers, curved tail feathers, a confident strut that says "I own this coop", usually do not appear until eight to twelve weeks. The comb development at four weeks is a good early indicator, but it is not foolproof. Some hens develop combs early, especially in warm weather or if they are particularly vigorous. The one on the right that had roo feather development from the start? That one is a safer bet for a boy, but even that can flip.
So here is the concrete, practical takeaway: mark the three with early combs and the one with early roo feathers. Keep an eye on the big one on the far left. Do not name anyone Gerald until you see those saddle feathers. In another three to four weeks, the picture will be much clearer. Until then, enjoy the chaos. You are not a bad chicken parent for being confused. You are just playing the game, and the game is not done yet.