What to do about raccoons
Many animals seem to like sunflower seeds and corn seeds - among them chipmunks, and raccoons. While a little plastic over the newly sown seeds will keep a chipmunk from feasting on your seeds, a raccoon will not be fought off so easily.
But here is how we made living under our porch inhospitable: We took ordinary mothballs and distributed them around the perimeter of the house, which drove the raccoon out of their humble abode and into the nearby woods.
We think they are better off there, and we will not lose all our corn and sunflowers to them again.