okay that makes much sense about the ferret then. wow, that must of been scarey with him eating all that stuff. now that you mention that, one day i saw part of a plastic glove [the disposable ones ] in their poop... why they eat that stuff...
anyways, as for the food. . a good quality food is for all: kits, moms, adults... no extra calcium is needed and its actually not a good thing, because too much can cause problems down the road..
although, some moms, and maybe it's all moms i don't know if this happens to all moms, but they do need some calcium after giving birth because they lose calcium.. and they might need a little during pregnancy, i can't really offer great advice on that because i don't breed. i just had a littler or two, and only know what i went threw..
jean