we bought hens but of course they said 95%. We have six of three different breeds. One of our white leg horns is significantly behind the others in developing wing and tail feathers. I'm thinking she (he?) may be slightly younger. However, there is more growth than any of the others in the comb area so my already attached daughter is quite worried that this one is a rooster. We got them on 10/20 and they were 1-2 days at that point so they are probably almost 2 weeks. Should we worry?