Why is our Blue Marans growing faster than my RIR. they are both hens, I hope, and the RIR's are 5 weeks older but the Marans is getting bigger than the other girls. The RIR's are 13 weeks and the Marans is 8 weeks. I have 2 other Splash Marans hens, excuse me, pullets, I am new, that I got at the same time and their growth seems normal, but the Blue is getting really large. Bigger than the 13 week old RIR's. Thanks for any help. This is my first post so I dont know how to put pics up yet, although I have plenty. I am really addicted and they are my wifes pets. Ha Ha.