Do you not use any greens, veggies, etc as part of the gutload?
This might help...
http://www.chameleonnews.com/07FebWheelock.html
"-Maximal calcium tolerances are likely 3-5 times corresponding minimums. Higher intake may lead to conditioned deficiencies of trace minerals combined with high- fat diet, formation of calcium soaps in the digestive tract."
Too much D3...
"-soft tissue calcification, depression, anorexia, polyuria/polydypsia (excessive drinking / urination), and weight loss."
http://www.chameleonnews.com/02MayDonoghue.html