If your pet can use an opening, a raccoon or other wild animal can, too! Besides eating your pet’s food, the wild animal could expose your pet to diseases. Fleas and ticks on the animal could fall off and remain in your home. Unfortunately, we cannot recommend any solution for cat doors or other pet doors except to close them off and don’t use them. Unless manufacturers develop a steel cat electronic door that only allows a collared cat to enter and actually stops the raccoon, we must give you the bad news. The present plastic doors are too weak to stand up to a determined raccoon.