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You wrote that if there is a rr offspring, "they were heterozygous". I had to re-read several times to understand that you were referring to the parents who have an offspring with a single comb, rr. Nice article though.

I live in Colorado. I insulated my coop, ceiling, walls and floor. Yes you have to put protection over the insulation except where it is out of reach, such as the ceiling. I used thin wall board to protect the insulation. I forgot the correct name but it is sold in big sheets, white on one...

I have a Black Australorp that started sleeping in the nesting boxes. The nesting boxes are filthy and whoever is laying eggs is leaving them on the coop floor. She's about 6 - 7 years old (yeah, I know....I'm going to start keeping a notebook). I assume it's because she can't jump up to the...