I just processed my 3rd batch of cornish rocks last weekend and have to say I was very disappointed in the weights after processing. I was expecting 4 and a half to 6 pound range but ended up with an average of 3 pounds each at 8 weeks and 3 days. I kept them of feed 24 hours a day for the first 4 weeks and 12 hours on and 12 hours off for the last 4 weeks and back on full time for the last few days. They were in a 12 foot by 30 foot run and enclosure. I had a total of 47 birds, 20 red rangers and 27 cornish x. I fed them chick starter for the first few weeks and starter grower for the last 5 weeks and fed them and occasional treat like pears, grass clippings, tomatoes and other veggies. I did let them free range during the evenings for about 4 hours a night so they could scratch and find bugs and eat grass. Do you think I got a bad batch of birds, meaning not real cornish or did I do something wrong?