These are my 6 week old chicks. Their dad is a French Copper Marans and I have no idea who their mom is. The one who sat on them is the grayish bantam in the pics. The dark legged one is quite a bit larger and it became fully feathered more quickly, but they were hatched the same day. The smaller one could be a bantam, but not sure since only 3 of 5 eggs hatched and the rest were crushed. Any idea or is it too early?
Bit early, but if those combs are pink already they may be roosters. You should be able to tell in the next week or two as any boys combs will turn red, while the females will remain yellow orange generally.