Are they really?
I only see one straight comb and some rose combs.. which are they supposed to be?
I guess I was thinking Seabright are supposed to be straight but looks like rose is correct.. I've seen the straights pop up in hatchery Wyandotte stock before (presumable due to rose comb association with slow sperm motility after several several generations). This is the first time I've seen it in Seabright.. but I'm NOT surprised at all. I used to think it was a shady practice.. and I NOW understand that when working with genetics.. it's not shady just because the "common" keeper (for lack of a better word) ins't in the know on the details and challenges which present.
The straight comb is absence of a comb modifying gene (recessive/not dominant).. So bred to a rose comb bird will produce rose comb chicks.. some with a hidden straight comb gene.. that bred to another bird hiding the gene or a straight combed bird would produce straight combs again.. sorry.. this might be a bit to off the rails!
Behavior *may* be you best indicator at this age. Any chicks constantly chest bumping already or always standing tall and watching with an eagle eye when you approach?
Red wattles.. not caused by flushing, are usually the first physical tell tale sign.. this follows shortly into the comb and may start to swell. Usually around 3-4 weeks.. I don't think I've seen it sooner than that, yet. My way too early prediction with NO relevance or reason other than usual 50/50 gender ratio.. is 3 cockerels, 2 pullets. Some claim the shape of the peak around the comb in the feathers to be an indicator of gender, I doubt reliability of that method.
Anyways.. beautiful babies!