My horse has been put on rest for several months by the vet due to an injury. That means no riding or light work at all. So basically, she's sitting in her field...and already she's getting FAT. I mean, its not like we're feeding her that much anyways...hay every once in a while, but she's getting fat off the grass. Yes, she's a very easy keeper. How can I maintain a fairly reasonable weight if I can't ride her and if she gains weight this easily?