I am in the process of purchasing a beautiful Morgan mare. Problem is, she's overweight. We don't have any hills near our barn, and our trailer needs a new floor, so we can't take her anywhere. She is only green broke, and doesn't know everything yet, including her canter leads. She is a western horse, and therefore I don't plan on jumping her, even if you were to suggest that. She's about 14.2-14.3 hands, and is about 900-1000 pounds. I also am not sure what I should feed her when she gets here. She is currently pastured in a fairly grass-less pasture, so gets hay morning and evening, and gets a 'medium sized coffee can scoop' of sweet feed in the evening. Isn't that a bad idea? Giving an overweight horse sweet feed, I mean. Are there any feeds that help with weight control? The only advice I have been given thus far about exercise is teaching her canter leads and doing circles. If you have any good ideas, please let me know. I just don't want her to founder or some such thing, she doesn't have to be in the best shape possible, although that would be nice.
Here is a picture of her so you get an idea of the problem: (No, she is not pregnant, and no, I am not on her.)