i bougth some cotrunix quail eggs to hatch to bring some new blood into my flock. i had 50 i bought off someone and 50 of my own i hatched. when they hatched out some did not have feathering on there backs and they still have never featherd out right yet there 4 weeks old nad they seem small. i thought they might have been from my birds so i ran aother batch of my eggs they hatchd out fine featherd out good growing good. whats up with other ones should i cull them when they get big enough to eat i dont want to breed them with my birds do i thanks for any info .