Not quite germane to tanning critter hides, but for simply saving stuff like that for dubbing and hairs I would simply throw a patch of it in the microwave and nuke it to kill any creepy crawlies that might contaminate the rest of the materials. Ditto self-processed bird skins.
I have seen some recommendations to alternate week in, week out, couple weeks in the freezer for getting rid of the creepy crawlies on bird skins.
