Lately, mostly after reading many posts here about the dangers of too much calcium, I've been using Repashy calcium plus (calcium, D3, vitamins) to dust feeders about 1-2 times a week and not leaving any calcium in the cage. Last year, I left calcium without D3 in the cages of the hatchlings only. Originally I wasn't doing it this year but lately I've seen signs of early MBD in 2 of the hatchlings, so I'm back to leaving calcium without D3 in the hatchling enclosures only.
Aliza