they often just strip the bark of trees just because.Maybe I'm wrong but I got the impression her acreage was wooded? Not just a handful of trees... Nothing wrong with it but what grows under a heavy tree canopy versus a grass pasture can cause digestive problems,especially if it's all they have to eat during turn out. Make sure you can identify toxic plants and trees for horses
Standing knee deep in grass and eating trees. Definitely something to watch out for.