I'm looking for advice on supplementing my mare's feed. Daffy is 26 years old. She has a very easy life for the past few years. Eat, poop, sleep, repeat. She's not been used at all, is on pasture April-Oct and dry lot with grass hay the other months. She's always, always been a very easy keeper, even during peak performance when we were both younger. Give her enough good grass or grass hay and she's sleek and rounded. I'm just noticing a decline in condition. Her coat still looks good, she's not wormy. Her teeth are good. She's eager to eat her hay and has pretty much free choice grass hay, same as all her life. But her top line is looking a little thin to me....what do you all think? Not the greatest pic with the shadows, etc, but you can see she's got a little prominence to the backbone. It's been so, so long since I had a hard keeper or had to supplement I'm really not sure what's the best thing to give her. She doesn't need high energy for performance, she just needs a little extra padding. I'd give her some of mine, but I don't think it works that way lol. Suggestions?