I ordered fifteen chicks from Hoover’s hatchery, and they were all the same size. It’s now three weeks later, I have three new chicks, and two of my buff Orpingtons are the same size as the day old chicks. They eat right and are very healthy, but they are tiny. Any guesses as to how this happens? The three weeks old other chicks don’t pick on them at all, but I don’t want there to be a bigger problem in the future.