The lavender Cochin is 20 weeks - hasn’t crowed, but has watched the other Roos Mount the other pullets. When she/he does it, our dominant rooster doesn’t react. When the other Roos do it, the dominant rooster reacts. The partridge is 19 weeks, and has crowed. Our dominant keeps a close eye on him. The lavender is much smaller than the partridge, even though it is a week older. He/she is the same size as the other pullets the same age.