I actually don't like that it has D3 and the vitamins in it, so I feed it very sparingly as a treat and to have my tort like it so in case of an emergency I have food to give him. I also feed a bit of Grassland Tortoise Food, which I think has some better ingredients (more hay-like) although not as well-liked by torts. I think small amounts of almost anything are fine. I would not recommend it be used very much, especially due to the addicting factor and it is much higher calorie than greens, and indoor captive torts have enough of a problem with weight due to inactivity and diet. Grassland and Mazuri are the only commercial diets I've seen that I would even consider feeding.