A week ago I brought home what I though were 2 six day old Amerauca chicks. A week later, one of the chicks is almost twice as large as the other. The big one is not only twice as big, but also twice as lively. The breeder says the larger one may be an accidental roo, the smaller may be an accidental welsummer, the smaller one could be sick, or it could be absolutely normal. That's far too many possibilities. I'm very new to owning chickens and I'm totally concerned that the little one may be sick. Hopefully you guys can give me some input thank you.