I don't know anything about the irradiation process. Your description kind of implies that the mice will be dipped into nuclear waste or something; I can't really see that happening. I'm under the impression that once any radioactive material has decayed, it is an inert product - safe depending on the element's other properties.

While at first I dismissed your post as a kneejerk fear response, it has made me curious as to the process. Thanks for that
Anyone know more?

Ian