I have used this with my older horses for a over a decade. I started using this when my 28 year old Tennessee Walker started loosing weight and nothing seemed to help him maintain it even on fresh pasture. I was worried it was his time. I went through a number of supplements and finally landed on Focus. Within a month, he was starting to look better, filled out and held weight. Focus and senior feed kept him with me another decade, living until he was 39 years old with never a day of colic. Focus has work for me, and I keep my older horses on it.