We feared it was something big in our attic. We call Fortified and they went right to work looking for the problem. He went through the attic and crawl space and found no evidence. He described in detail what we would see if there were such a pest. It sounded like something big to us. He was knowledgeable and we felt assured that there were no animals or pests in our home. Thanks Fortified. – Diana Paradiso, Las Vegas, NV.