I have seventeen 5.5 week old chicks and I have a feeling Riversong is a roo. She had a growth spurt around week three and was significantly larger than the rest. The others have pretty well caught up at this point but based on things I’ve read here and elsewhere online, here are the factors that make me think SHE might be a HE. 1- Bossy; River is very bossy, pecks at the other chicks (just once, she’s not obsessive) if they startle the others or get too rambunctious. 2 - Protective; River is always the first one into the coop to check it out, then back into the run until everyone else is in for the night. Also been known to sit on the ladder blocking the others from coming out again until I come out to close the hatch. 3 - Comb is pinker than the others, but not by much. 4 - Her feet are huge. They seem twice as big as my (assumed) Orpington. May be perspective. I’m holding out hope that’s she’s just top of the pecking order. Give it to me straight.