My chicks will be 4 weeks old on Monday. I raised chickens while in my teens and have taken a hiatus. I'm having to re-learn EVERYTHING! I have 7 chicks and have no clue what gender they are. I'm not super concerned about breeds (assuming these are all mutts), but if one looks familiar, that would be fun to know, too! The place I purchased the eggs from asks that, if you need to return any chicks, you do so by around 4 weeks. After that, they charge $15 per chicken (rooster, in our case) to place. We live in a city that does not allow roosters, so we are trying to only keep laying hens. Thanks in advance for any help or guesses! There are 4 yellow chicks. They all looked very similar up until recently. Now I can distinguish the 2 with larger, floppy combs, and the 2 with combs that seem to have stopped growing. One of the yellows with the small comb: We call the one in the foreground "Firstborn." We were initially going to call him/her Henrietta, but s/he grew so big so quickly, I just sort-of figured he was a roo. But he's incredibly calm and mellow. Still much bigger than the others, but that could just be the breed, right? His/her legs are really stocky and are an avocado green. We initially thought these 2 were girls, but the one in the foreground is a confrontational pain in the butt. Personality? Pecking order? Or sign that "she" is a "he"?