If it's not due to injury, then it's a calcium/d3 issue. I see that you're dusting with calcium at every meal and that's good, but if the calcium cannot be absorbed it's useless; how fresh are your bulbs? And do you take him outside for natural sunlight..? You needed to gut load with more than just apples and carrots. A dark leafy green vegetable like Turnip or Collard greens (to name but a few) should be a stape gut load, as well as some form of grain……..