 Another thing to keep in mind is that a lot of trash piles up in these dirtiest cities. And the things you have to remember is that if your dog likes to scavenge and look for things, you're going to find bones that may have maggots and stuff that he's bringing with him or picking up in his mouth or her mouth. You want to make sure that's something that they can't have access to. And you just want to make sure that trash also includes can lids.