I love horses.
I rented a restaurant on a hippodrome one year ... and it didn't take long for me to get horse fever
I became an apprentice groomer and was paid with the occasional run
Then I bought a race horse (half-horse) ... then my mom died and so I moved.
But later I owned a pony ... and then after that I owned a miniature horse
Apples are almost like candy to a horse ... one a day would be plenty ... maybe offer a carrot as a second treat. And if you can find birch logs toss one in from time to time - he will eat the skin and it will naturally ward off worms