If you want to keep them from being too fat , just let off on the feed a little bit every day. They will thin down. If you keep them so fat they can't walk they will die when it gets hot, like 90 degrees. I hate having big dead rooster Cornish Cross chickens die when they are 6 lbs and just a few days before I take them to the butcher.

But the fruits of the spirit is love, joy, peace, patience, kindness, goodness,faithfulness, Gentleness and self control. Against such things there is no law. Galations 5: 22&23