I have a Black Sex Link, Omlet, that was noisy for at least a week before she laid her first egg. Now she seems to know somehow when the others are ready to lay their first egg. Omlet was real noisy yesterday, standing on the walkway in front of the nest boxes Bawking loudly for about 15 minutes. About 10 min. after that our Red Leghorn laid her first egg without a peep.