I assumed the crouching was a "ready to start laying/mating" behavior, but only one of my three chooks will crouch and quiver when I walk over to her, whereas the other two don't. All three are laying. The chook who crouches was the first to start laying, and she's also the "top dog" in the coop and is often seen standing on top of the smallest hen and pecks at the back of her head, and chest bumping anyone who gets too close to her when she finds a tasty morsel on the ground. So I guess my question is, is it normal to have hens that don't display the crouching behavior at all or will it come over time? They're all still fairly young - I've had them for three months and they were at point of lay when I got them.