Have one of the above, and have read that these horses are often lazy types. Feeding doesnt seem to make much difference, he has been on oats now for 2 weeks and I cannot see any difference in him ? I am feeding as recommended by a nutritionist. I am wondering if his age is now against him, he is 21. Do you think big horses are like big dogs and dont go on so long as small dogs/ponies. I know several people with much older cobs etc that are still very nippy! He has a bit of arthritis but otherwise fine. Vet is happy that he has no other discernable health problems