I have owned my mare for around three years now and have been fighting her obesity just as long. She is 8 this year and measures just under 34" tall. She was starved before she was rescued, and then was fed way too much to the point of extreme obesity by her foster owner. I was in no control of her feeding for a year and a half as the place where I boarded her at refused to feed her separately, and I had no option of moving her at the time. After I finally was able to take her home I closely monitored her feed and she did drop the weight decently. Then for winter she started to really pack it on to the point of unhealthy, even though I fed her the same amount. It seems like a vicious cycle. I have never gotten her to her ideal weight each summer, and just when she starts to slim down and look good she manages to balloon up again. I have tried just about everything suggested on other topics to get her to lose weight. Currently she is on a high quality grass hay. I give her about one flake a day total, split into three meals in a slow feeder. She also gets a small handful of SafeChoice feed with her joint supplement and omega horse shine. (She gets the joint supplement because she does a lot of jumping and driving in the summer, but has no joint issues, and I like to continue her supplements year round) I'm toying with the idea of adding some alfalfa into her hay for extra protein, as she did a little better on it two years ago when I tried that. The only issue is that she gets the runs really easily with the alfalfa, even if I introduce it slowly. Her other problem is that she will eat ANYTHING if she thinks she is hungry. Even though she has been rescued for four years, she still has that starved mentality and tries to eat anything whenever she can. If she is in her paddock, which has minimal, extremely short and sparse grass, she will eat any weed that grows. Nothing is poisonous, but I can't imagine that it is healthy for her. This summer i sprayed her paddock and moved her into the dry lot while I took care of the weeds. Even though she was on the same feeding schedule and got the same amount of hay, she started to eat manure! Her meals are very regular. I feed at 6am, 3pm, and 8pm, as I have to work around school. With the slow feeder it takes her several hours to eat her little slice of hay. She also has a free choice salt block in her pasture, which she uses a lot. I strongly feel that she does not have a thyroid issue as she does not display the cresty neck or any of the other visual issues. She doesn't even have fat deposits. She is just very, very round in the barrel with an even bigger belly, as if she was going to give birth any day now! I want her going into winter a little slimmer so that she comes out at a decent weight that will be easy to drop for show season next year, so any tips would be greatly appreciated!