I've had chickens for two years now and last year I added some more to the flock. But this year I'm concerned that my Silkie/Wyandotte hen crosses are going to be to small. (The roosters from the same batch are normal size.) They are four months and only about a quarter of most of my other hens' weight. I've tried the "cage in the coop" thing, but my older hens still try to peck them through the bars. And being as they're so small I'm afraid to try it without the cage. What should I do?