I hear Mazuri is the best. I was going to get some iguana food for my green, but I got really sick and was forced to give him away to some nice people that do rescue around here. A lot of people on here use Mazuri tortoise food, but I think the one design for the igs is better since it has more protein which the igs need; tortoise don't need a lot of it to grow well like the igs. The tortoise will grow too fast given too much protein and pyramide out of control. I think with the iguana food you just sprinkle it on the greens and veggies to add extra nutritions to the food.