I've had two chickens die this week without any definite reason why. The last one we opened up to see if there was anything that looked wrong. The only thing we noticed is that she was fat. She didn't look it and I hadn't been worried about it but now I'm wondering if that is my problem. How do I get my chickens to lose weight? They free range at least part of each day and at least 4 days a week for the entire day 8am to 7 pm. I only give treats when I call them. Although my son may be sneaking them snacks.