I was just doing some reading. I feed my Russian Tortoise primarily greens. Green collards, red leaf lettuce, romaine lettuce, etc. I through carrots sometimes in there. He gets about 4 oz in the morning, and then a little more later in the day (about 2 oz of food). I put a little sprinkle of calcium in his food. However, I don't know how much calcium to give him. Should I be giving him anything else? Any protein? How often and how much calcium should I be giving him? Thanks.