I have a BBW hen that is now about 6 months old. I would like to keep her alive as long as I can because she's very sweet. I have read on here that the way to keep them as healthy as possible and not overweight is to limit their feed and ensure they can free range to get plenty of exercise. She free ranges 24/7 and I usually feed her a little in the morning and a little in the evening but every time I do feed her she acts like she's starving, scarfing it down so quickly that she sometimes chokes it seems because she starts coughing and shaking her head. She is on Dumor 14% Game Bird Maintenance crumbles. How do I know if I'm feeding her enough to keep her healthy but not so much that she'll get too heavy? Nowhere I have seen mentions a specific amount they should eat to be kept as pets.