My daughter has found a much better way to get rid of mice instead of mice/rat poison bait. She mixed baking soda, flour and sugar.
This mixture gives the mice gas and they cannot pass it so their insides swell and pop or seem to.
She said she sees the while mixture being tracked and found one tonight all swelled up and blue.
This is much safer than that rat/mouse poison that they market to lay out around the house.
Hope this helps someone else.