Mic makes a very good point. When I first started running (after having ridden horses for 20 years or so) I was absolutely horrified by what I knew I had done to some horses. I only wished I could find them and apologize. If you are not fit and are not conditioned or change to different terrain or work too many days in a row, it hurts! With our endurance horses, we start them very slowly and only increase speed or distance and never both.
As for feed, I'm not sure that sounds out of line. My 12 year old TWH (14.3, maybe 800- 900 lbs) gets 3 scoops of beet pulp, 2 scoops of rice bran pellets, 1 scoop of BOSS, one scoop of a local grain mix called LMF showtime, vitamins in the am and a whole lot of chopped carrots and all of this twice a day, plus pasture and a good quality grass hay. The other thing here is to remember that there are scoops and scoops. They are not all the same size. Nancy
