the marans cockerels are good to be processed at 5 and half month to six month old .
here how they do it in France .I do the same thing too .
first 2 month ( 8 weeks) under the heat lamp . feed chicks crumble at 20/22 % protein
from week 9 tell 5 month of age .they are out free ranging ,they allow 5 to 10 square meters by chook .feed .pullets grower 5% of the ration the rest 25% wheat or corn .
last 2 or 4 week .the chooks are held indoor .in special cages or small pens . feed .corn flour and milk . in this period the chooks rest and put a little weight plus they meat become tender .
I found left over bred from the bakery socked in milk does the same thing plus is free too .
my cockerels carcasses at 6 month is around 1.7 Kg to 2.5 Kg ,some varieties have better mass than other .
if you still want to process them around 4 month old than you have to start them with high protein chicks started 25% meat bird starter of wild bird for the first 6 weeks .
chooks man
I wondered if I should pen them up for a while prior to processing them. A lot of the old timers say they did it that way when they had chickens to butcher. In my mind I was thinking they would get fatter free-ranging because they constantly graze, but instead they stayed pretty lean. Very healthy, but lean.
Your method makes a lot of sense. It fattens the birds up and keeps them from moving around so much to tenderize the muscle mass. I will be trying that next time. I will slop feed my culls bread, corn, and milk and fatten those boys up. Thanks Chooksman!

