[Loganberry]

Rather than that, which might mean overdosing them, mix a little bit of cereal for humans, like cornflakes, in with their food. Our breakfast cereals are fortified with vits, but mice can't eat so much of it they OD.

 

[Loganberry]

PS Also, should have said before, just be careful of giving them cereal with too much sugar - try cornflakes and bran flakes, just a small amount added to their regular mix.