you can try these out: It's Not as Difficult as You Think

https://horse-feed-range929.novacrestiq.com/posts/what-horse-feed-is-most-suitable-for-hot-horses

Nutrient-rich horse feed sweet feed made to promote healthy weight, consistent energy and daily condition. Suitable for equines, ponies and regular stable management, with tasty grains, molasses flavour and balanced nutrition.