At three weeks all you can do is cull the real small ones and the ones that you can see a problem with. They may all develop a bar through the eye. When you breed domestics you have no clue what will pop up. It will be another month or 6 weeks longer until they would have grown and colored up enough for me to choose the ones I like best. Cliff has a more experienced eye and I'm sure he'd be able to choose the best earlier. Choosing the best of a group is an ongoing process.