Poor fertility or something else?

[Jendenscott]

I have 25 hens, a mix of bcm, cream legbar, Easter eggers, and barnyard mix. I have 2 roosters, a bcm and a lavender Ameraucana. All the bcm eggs and brown eggs I try and incubate are fertile and hatching, yet not a single blue egg ever starts developing and most green don't and if they do they aren't making it to hatch day. Is this a rooster problem or a hen problem or maybe both? I know the bcm roo is servicing most of the flock, the other roo is more docile for sure. I guess I need to take the time to try and watch? I just can't figure out why not a single blue egg is fertile, like half my flock lays blue eggs and I'd sure like to hatch some. Should I add another roo to the flock?

 

[Chicken_tiger_catt]

At roughly 12 hens a roo, I wold not add any more. The eggs that never hatched could totally be a hen problem, and you could see if the Roos favor brown egg laying hens over blue.