Well, just went through 21 pullets and gave them the "Hogan test" (
https://play.google.com/store/books/details?id=DiJDAAAAIAAJ) Basically at this point I was just looking for the birds with the most width between the pelvic bones and the most space between the pelvis and the end of the breast bone. Out of 17 girls hatched April 8 I tagged three or four keepers. There are also 4 younger girls, hatched in May that I am keeping an eye on. Most of the keepers are actually out of Welsummer girls and an EE roo. So they are going to lay brown or green. But the EE girls I started with are so pinched in the tail they are teardrop shaped when seen from above and I"m trying to get them widened out a little.
I have another EE boy that is fairly wide in back and also has a big chest. I have a young purebred Ameraucauna pullet that I am going to breed him to; she is a very small bird, but she is fairly wide through the pelvis; I'll also breed him to these pullets I just selected, hopefully the next generation will be wider and lay nice blue eggs.
Do any of you select birds based on their size and shape rather than their egg color?