Thankyou

I did number the eggs and numbered the order in which they hatched with descriptions of each chick (and I had a physical problem in the incubator that meant I wound up taking out each chick separately so I could track their egg). That means the distinctive chicks I now recognize, but the ones that are similar (the blues) I can't figure out. So yes, I can see that baskets and bands would be very helpful (but would need to know more). Because I would really like to know for sure who the two pullets were born to, and I see now it might be good to be choosy about whose eggs I incubate in future.
Also I could add that the eggs were all mixed up in the incubator so it's not that the 2-sets of 3 eggs were next to each other and that's what produced the time-similarity of hatching. They were widely separated, even after removal from the turner.
p.s. I love the cockerels, they are being so darling and sweet! I know they won't stay quite that way, but I'm pretty attached.