The chickens I purchased from a breeder appear to be to fat. I noticed that the chickens had un-eaten bread in the area where they were kept. Also I observed a rear of a pick-up truck full of bread, that I'm assuming that had to be the main diet she fed the chickens. I need to know how to slim these chickens down, because they are as fat has (double hockey stick word). I only have the three rhode island red hens that I purchased from her, and do not plan on obtaining others. My question is how to get these chickens to lose weight without harming them, and without a treadmill. What should I feed them and how much? My chickens are kept in a 4x8 foot cage, with a wire floor, in closed with plywood and tin sheeting. They need to be kept like this do to hawks, racoons and ect, they will not be free ranging.