For three weeks in a row, when I opened the Food Pantry, where I work,
there was a chewed open styrofoam "cup of soup" on the floor. I figured
it was eaten by a mouse until the church secretary told me that there
was a red squirrel in the church.
She called pest control to remove it and they baited a "have-a heart"
trap with peanut butter and nuts, no luck after a few days. I took the
trap to a different location closer to the food pantry and re-baited it
with a styrofoam Cup of Soup We caught the little bugger the same day.

It chewed a little hole in the styrofoam and ate all of the dry
ingredients in the cup.

Denise