I want one of my does to lose weight. I've cut her pellets back to... almost nothing, just 6 to 8 pellets a day. She has all the hay she wants. But she is also in a large 12 foot by 24 foot outside pen and there is lots of grass growing in there. Do you think she will just keep herself fat by eating the grass? I always thought grass was low calorie for them but I just read an article about horses and it said horses can get fat from eating too much grass, and sometimes to lose weight they take them off of the grass pastures. So do rabbits get fat from eating too much grass? Will I need to take her out of her pen off the grass to get her to lose weight?