Leave some marshmallows in the park and find out :) Although it depends on the size of the marshmallow, a squirrel probably won't eat one that's too big to fit into its mouth.
you need the ASPCA YOU RUN UP BEHIND YOU THEN f*ck you in the @ss...sugar should never be given to wildland forest creatures even if they would you should be kind to Gods creatures because the meek shall inherit the earth