Pet doors offer raccoons immediate access to the interior of a home. This is vastly different than being separated from humans by an attic wall or the bricks of a chimney. They are, indeed, right up close and person in your kitchen or wherever you have put down pet food for the easy access of your dog or cat. As you can imagine, there is greater potential for damage to the contents of your home in this scenario, not to mention the physical safety and health concerns for you, your family and pets.
Raccoons are omnivores and eat practically anything - squirrels, mice, rats, gophers, baby chicks, and baby rabbits. They have preference for plant-based foods. They favor the delectable offerings found in and around water: frogs, snails, clams, fish, and crayfish. They raid bird nests for tasty eggs, rummage through trash cans for leftovers and will consume roadkill if food becomes scarce.