I have raised a group of Meyer Hatchery's Rainbow mix pullets. I knew because this is a mix of breeds some would lay earlier than others. Began getting eggs from small white hens at 4 1/2 months. Now at 6 1/2 months I am only getting eggs from 10 of 23 hens. I thought by now they all would be laying. Another puzzle is the nesting habit. All of them insist on using the same nest, but scratch all the nesting material out immediately, I have used straw and pine chips with same results. Never had more than 4 bantam hens at one time; these full size chickens are a mystery to me.