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.

Other resources: https://www.farmshow.com/a_article.php?aid=22264

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 http://www.dap.com/media/53532/00079010001english.pdf