From a friend – Was able to get rid the mice and rats –  chewing – trying to get in under their country home.
Used popcorn with heavy oil and coated it with plaster of Paris (use paper bag for mixing and avoid inhaling the powder) – kills them right away – gives them a belly ache then they die.  No harm for those that eat the dead bodies.
No more rats on video camera. A done deal.
The mixture constipates and kills squirrels and other rodents, but has no harmful effect on predators that may eat the dead animals.
Plaster of Paris safety data sheet – see page 4
Home Made Plaster of Paris - Rat - Mouse Control

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