I'm wondering is my 13(14 this june)year old OTTB mare could have an ulcer, I can't afford to have an endoscopy done, but she is showing some signs. I got her at the end of May, and we started training in September/October. When I first got her she was kinda crazy, 2 weeks after I got her I tried to lead her out of the pasture for the first time(we have her and my 2 others on 24/7 turn out with a nice run in barn, we have feeders in there were we grain them) The first time I tried to lead her she kept running circles around me, dragging me and running into me, basically horrible ground manners, after that I decided she needed more time to adapt , so I just lead her around in the pasture working on keeping her our of my space and leading respectfully, when I finally found someone to help me with her we got her out of the pasture and next door(where they have a small riding arena) and we worked on leading over there and then lunging, after a few weeks she was finally acting lady like and we started under-saddle training, around that time I noticed that while she was eating she would kick at the wall behind her and bite the wood on the wall in front of her, but the donkey was on the other side of the wall behind her, and my old gelding in front of her, so I thought she was just been food aggressive. She was responding really well under saddle(she probably had had some formal training, but i'm not sure) She started doing some odd behaviors, she became girthy, biting at you when you girth her up and threatening to kick, and then when she was being ridden she would sometimes attempt to cow kick at you. She has also been harder to keep weight on. I haven't worked her since the end of November because of my trainer moving and the weather, but she is still being aggressive while eating...would she benefit to being put on an ulcer supplement or is she just acting up?