i have 6 pullets who are all about 4 and a half months old. a week ago my barred rock started laying eggs and we have been getting a egg a day from her so i was wondering, when they start laying eggs are they full size or pretty close to being full size? i know that barred rocks are supposed to be 7 to 8 lbs. but mine is only four and all my others chickens are around that size too? so is it normal for them to be pretty small when they start laying?