Hello friends. We have 2 Partridge Silkie birds who are now almost 9 months old. Muffin is the grey-ish bird and Puddin is the larger brown-ish bird. Puddin (the darker one in the last 2 photos) lays eggs regularly. However, Muffin (the lighter one in the first 4 photos) does not lay eggs, does not crow, and loves to peck others. How old are Silkies when you can actually tell the difference for certain? I posted about them when they were 4 ½ months old and we were all having trouble identifying roo or hen at that time. I am hoping for better luck with Muffin now that they are almost twice as old.