I work for a rescue and rehabilitation center. We currently have a 20+ yr old mustang mare that I have been working with. When we got her she was starved and severely emaciated. We have brought her back up to weight, actually over weight now. Now that she is healthy we decided to see how she did with the kids on her back. She loves kids and does great with them with only a bareback pad and a halter with cotton reins. I was unsure if she could hold my weight (140lbs) but a friend came out, checked her feet and joints and advised that my weight should be fine but not to exceed 150lbs. So yesterday I saddled her up with our lightest fiberglass treed 14in western saddle and climbed aboard. She stood perfectly and did everything I asked. We went both direction and she neck reins beautifully. We practiced her brakes and backing up. She is a little stubborn though and will refuse to do things at times so I have to push her and constantly be on her reminding her what she is suppose to be doing and this is just in the round pen cause out of the pen is a whole nother story. We have no idea the last time she was ridden so I expected her to be rusty and can work with her on that but the major problem I need advice on is that she is food minded. If she sees grass where she can graze or a bale of hay she will not listen at all. She will drop her head and refuse to pick it back up. She wont budge at all no matter how hard I push her. Even leading her from the ground she will plant all four feet and no matter how hard I pull will not move. To solve this problems I have been either backing her up or spinning her in a circle to get her feet moving and after a few rounds of that she will eventually follow like she should but the strategy does not work in the saddle only on the ground. I am just riding her in a halter and cotton reins and was wondering if a bit might work. I was thinking a snaffle cause she doesnt really need anything harsh just a way for me to get her attention off the food. I can't ride her anywhere but the round pen because of this obsession with food. And it is making it hard to re-tune her trail skills when everytime we get on the trail she sees food. Another question I have is how long should I ride her at a time ad how many times a week? She is definitely an older mare over 20, has not been ridden in at least 5 months, maybe longer, and she is over weight too. I don't want to work her to hard but I do wnt to get her back into shape. She has no muscle just all fat and she is nothing but sprung ribs and a barrel. What is too much exercise for her and what are good ways I can exercise her and try to get her in shape again? Thanks in advance!!