I picked up a very cool old horse for my son to learn on. This guy is 17yr old and on the thin side, he's had a very hard life! (In need of some major TLC). I've always sold my horses before they got old because I didn't want to deal with the maintenance. Therefore, I'm not really sure how to feed him. I need to get some weight on him before winter, so I don't have long. I plan to get his teeth floated, although he doesn't drop much grain so they probably aren't too bad. So my questions-
1.) What kind of wormer is best for an old thin horse?
2.) What can I feed him? (not a complete pelleted feed)
Growing up we fed our old horses a senior feed with a cup of corn oil. However, I really don't want to feed a complete feed. What I would like to do is mix my own, I can't seem to find any example rations. I'm knowledgeable in ration developing for cattle but not horses. We feed cattle and mix our own rations daily. I have good Alfalfa, grass hay and pasture available. So, what can I supplement this old guy with to make him gain weight? Again, I don't want to use any complete feeds except maybe a COB sweet feed. I prefer to mix something out of what I have available. Alfalfa, oats, corn, barley, beet pulp, distillers grains, soy, peas, rice bran... I can top it with a fat of some kind, corn, soy or canola oil whatever is best. If there is anything else I didn't list I might be able to get it too. I can get what I listed above, that doesn't mean I need to feed it.
Suggestions please!! I just haven't found much online about designing a ration for horses. I know I can mix something for a fraction of what complete feed will cost.