Wow we had these. They were in the fish food, the dog food, the cat food, you name it. I first noticed them because our dog had dropped a cookie behind the sofa, and they were living in the cookie. We had to vacuum the area, under the sofa, buy an airtight cookie jar for the dog, etc. We started only keeping small amounts of fish food out in airtight containers, and freezing the rest. We also switched to foods for our cats (already used it for the dog) that had ziploc-type closures on them. I still see one every now and then. They are really a problem. I'd get rid of the food and start over, or you'll never get rid of them!