20 weeks is still pretty young. Hatchery birds will generally lay before breeder quality. Most of my original hatchery girls started laying in the 21-25 week range. My breeder quality birds I never expect anything before 24 weeks.
It's actually better for their bodies to start laying later. Early laying can cause laying problems when they are older.
Good to know, thanks! Okay. All but three of our chickens are BYC'ers, the other three are from a feed store and are a brahma and two wyandottes.
So out of:
Brahma
Wyandottes
Marans
Olive Eggers (Marans x Isbar)
Ameraucana
Who is most likely to lay first?