This is my 1st time incubating black copper marans and just wondering what is the best way to see through these dark eggs? Also do they normally hatch on time or early or late?. Is this a breed that grows fast once hatched? would love for any advise on this breed that any one may have as iv'e never had this breed. Thanks in advance Ps i currently have production reds, ixworth(english breed), silkies and pekin(cochin) mix.