I purchased 6 Cochin chicks on June 10 and I figured they were 1-2 weeks old, from the way they were feathering. I've read that Cochins are slow to mature, but mine are still so small. They are 11-12 weeks old now. Here they are with one of my Buff Orpingtons (who is roughly 1.5-2 years). Are they bantam cochins or standard?