Went out to feed my chickens and there is dust everywere. I opened my bag of feed and on the outside of the bag there is always dust. Well today the dust was moving. Tiny white bugs moving all over the bag. I have seen pictures of lice and I don't think its that. They are nowhere else but the bag as far as I know. Dust mites maybe? Wife is affraid I will bring them ion the house. Help.