I put eight young roosters in the freezer last week, they were 3-1/2 months old and were extremely close in size. I didn't weigh them prior to processing but they all dressed out between 3lb 2oz to 3lb 5oz without necks or feet and ready for the freezer. Just the straight carcass. I free range ours on a 6-acre pasture and they get free access to 16% all flock feed. We are one for dinner yesterday and it was excellent.
Wow, that is really encouraging!