Had 10 chooks. 1 was a cockerel, so leaves me with 9 pullets. So I had to replace him, right? So, I pick out 2 new chicks, but that would leave the 3rd one all alone, so I take all 3. 3 chicks=1 cockerel. But, I'm thinking, none of my 27 week old pullets are laying, so its not like they count as whole chickens! So, there is no reason that I cant go to the chicken sale coming up. 2 pullets=1 hen. 3 chicks=1 hen. So I really only have 5 1/2 chickens. I think that's how it adds up.