In all the years that I've raised them, I have always given the babies the supplements the same way I do for the adults....phos.-free calcium at most feedings (and since they get fed more often, that will mean that they get supplemented more often with the calcium) and the phos.-free calcium/D3 twice a month and the vitamins twice a month. The vitamins and D3 are meant to ensure that they get some without overdoing it and leaving them to (hopefully) get the rest of the D3 from their exposure to the UVB and the rest of the vitamins from their diet.