we received two orders last week from meyer hatchery and cackle hatchery. each time, they added in a couple of extra chicks. how do we know if the extras are roos or hens? will they have marked the roos, as they do the roos that we ordered? (the light brahma roos we ordered have a purple spot marked on their head.) or is it a mystery if our extras are roos or hens? thanks!