i got my barred rock and white rock the same day.. supposively same age but I suspect the white is a day or 2 older . Its been 6 weeks of white grows, barred catches up almost, white grows..... but now the white is significantly larger and the barred is not catching up as fast... should they be the same age when fully matured? Is this normal growth? The barred is picked on every time I try to introduce the 2 girls I have that are 2 weeks older. my 8 week old orpington is the same size as my 6 week old white rock in the picture so maybe the white rock is abnormally large... thoughts?