It is good to see so many good responses to your inquiry. Tortoisehead and Shrively have valid points. I have found with my three sulcatas that a large infusion of grass is beneficial for their digestive tracts. Hay is good, but ours just don't seem interested in it. They, however, absolutely love the bluegrass and fescue mix we laid in their pen. We also plant bird seed in their pen so they get a good weed content also. We also feed them a wide assortment of veggie scraps from the supermarket--the only foods to really avoid with them are the toxic ones, like eggplant and avacadoes, and the worthless ones, like iceberg (head) lettuce. There are more toxic veggies than the ones I mentioned, but I don't really have the time to list all of them here. If you need a list, post a request, I'm sure that dozens of herp-lovers here know them all. The key to their diet is variety--but mostly roughage, like grass, hay, and kale. Other types of greens are good, as well. (Mine particularly love brussel sprouts--go figure) But don't give him too much of any of it.
And the second important point the others made is, it is much easier to simply refer to these guys as "Sulcatas." Their technical name is "Geochelone Sulcata," and there are important differences between these beauties and the "spur-thigh" tortoise. Primarily size, but others as well. Sulcatas are phenominal animals, and yours will do very well, if you give him the proper diet and environment. Good luck
menagerie