Sorry it took me so long to reply. I feed him a lot of grasses, cactus pads, squash, dark greens. Limited amount of fruit. His favorites are banana and mango. The diet should be low protien. If given any dog food, it should be very very small amounts, no more than once every week or two. If you go to the tortoise trust site, they have species specific care sheets. There are so many foods they eat, it helps to make yourself a list of healthy foods so he gets a well rounded diet. If you get a tortoise, make sure you do the research. My boys current pen is 5" x 7"
Good luck!!