Originally Posted by lakotasbluesky
A normals horses diet cam be anything! ....Thourobreds need extra food because their matabolsims can be really fast!
Hey Lakota, I think OP may have meant a natural diet. While some types do indeed have different metabolisms, they don't *necessarily* need more food and it comes down mainly to deed rather than breed - a TB in little work won't be necessarily different to any other horse for eg.
OP, agree with both above, esp with Kitten, that basically the best 'staple' is grass/hay. Learn a bit about their digestive system & what is natural to them & this will help you work it out. Eg. They are 'trickle feeders' meaning they've evolved to eat tiny amounts near constantly. They have evolved for fibrous, poor grade(compared to most cattle-fattening pastures) roughage and don't cope too well with sugary, starchy feeds. Their metabolism has also evolved for storing fat over the 'good' seasons in order to survive the 'bad' and IMO it is not a bad thing for them to lose some weight & use their fat stores over winter.
Safergrass.org is a good source of info on diet as it relates to health. FeedXL.com is a valuable service to help you get specific horse's diets right. Hoofrehab.com has a number of articles on feeding, along with all the other great info there.