the schedule I use for my veiled and I know alot of other forum members use is as follows: 1) calcium without D3 at every feeding (I only dust crickets/roaches, not worms) 2) calcium with D3, once every 2 weeks and 3) multi vitamin once every 2 weeks (on alternate weeks of calcium with D3) Gutloading your feeders with fruits/veggies/greens is just as important as supplementing them. If you want more info on gutloading do a search and there is lots of different ideas/blogs/recipes to be found.