My MIL recently gave us 10 hens and a rooster that they have had since last fall in their horse barn. The chickens originally came from a commericial chicken farm. I believe that the chickens are White Rocks. The hens are not laying but about 4 eggs a day. They have been enclosed in a double horse stall for awhile with only some electric light as their light source. My question is: can chickens become obese? These girls are HEAVY and it looks like they can hardly walk around. They are not at all like our chickens, which include some other Rock varieties. I asked my MIL what she had been feeding them and she said that they have been eating some laying crumbles but mostly they like to eat corn. I am hoping that now they are out in the open and free ranging (in a large fenced area) they will begin laying a bit more but certainly if they are obese that will have some impact on whether or not they are laying, I would think?