Hi guys,
:shock: I don't know much about this but maybe if your gonna 'mush' a garden skink anyway, you could make up a kind of skink sauce. I reckon you could mash the skink and maybe add a few drops of olive oil (waiting for it) to give a bit of consistency. You should then be able to keep this in a plastic (ziplock) bag in the freezer and just thaw a bit out when you thaw the mouse out.