We have the chickens! I took a bunch of pictures but most of them turned out blurry because they just wouldn’t stay still. I have attached the better ones and numbered them all. #1 and 2 are about 3 months old; 3 and 4 are very small, I would say less than 2 months but maybe they are just small breed? 5 and 6 are 2 months old. From the comb color #4 seems like a cockerel but the body shape and feet really look like hens. Fingers crossed!!!
Boy it sure would help to know the breed and ages of all of them for sure.
If as you think 3 & 4 are younger they could both be male just by the pinkness in #3s comb. My gut tells me they're older than that though and that #3 is a pullet. I am pretty certain 4 is a cockeral but it is hard to say for sure. You could repost pictures in a week or two.
Also what are the temperatures near you? If they're very hot it can make the combs appear more red at an earlier age.
#5 & 6 appear older than 8 weeks to me I'm not sure how much older it's hard to say in photos. If they are 8 weeks I'm very suspect of number 6 especially. I've never owned a chanteceler personally but have owned other pea combed breeds.
Also number 5 may be a Cornish mix but definitely doesn't look pure. It's the wrong color and the wrong comb.