Cat plague?

So some researchers figured out the mice can smell where to dig up sown grains, but if you spray a bunch of wheat germ oil then they can't find anything and give up like 70% of the time.

Also the Australian authorities on chemical sale have allowed double strength rodenticides to be sold, which sounds kind of dumb because the rodenticide should already be enough to kill mice so the only upside to double strength would be killing things that eat the mice...

Which I guess also includes the mice, but still...