While allowing my gelding to graze around the yard yesterday, he spotted a bush full of rose hips. The berries are plump and read and do look quite delicious, but knowing how tart they are to people, I didn't expect him to dive into it and begin feasting. I know rose hips are high in vitamin C and are sometimes fed ground into a powder as a joint and immune system supplement. Are they safe to feed raw, right off the plant? We have had a few frosts here now, so the leaves are almost gone and the berries are well ripened. Since Sam loved them so much and he's an old guy with a little arthritis, I am wondering if I should go and pick a bunch to feed him over the winter? Also, does anyone know what kind of "dose" would be safe / appropriate for a horse, or even if you can feed enough to be therapeutic?