I inherited a 9 lbs desert tortoise and had nothing to feed him so I gave him some smoothie mix I had and he loved it. I am wondering if it is good for him. He lives in an enclosed backyard with a lawn and ungroomed plant beds so he can eat whatever. I feed him a mixture of sprouted black rice, chickpeas, black beans and wheatgrass that I blend into a mush. It's about 50% wheatgrass. What do you think of this?