I just started raising chickens. Two friends and I were going to get 20 or so birds each, we ended up getting 200 chicks. we thought we were going to get a better selection, no Cornish X. Out of my 67 birds I have 8 hens (Araucana's), These we will keep for eggs. My question is this,1) do I need to keep a rooster for egg production? 2) how old should the chickens be to butcher? Black Sex link's,Barred Plymouth Rock's