I've been wanting to add a speckled sussex and a blue laced red wyandotte (pullets only)and a banty roo that's not a mutt or mix to my small flock. I have someone who has hatched just that 2-3 days ago but I'm not wanting to buy straight run. What's the earliest clue or hint of sex in these little guys? Any help is much appreciated and time is of the essence. Many thanks in advance.