Are there chew proof dog doors? There are dog doors guaranteed to be chew proof. These usually have a higher up-front cost, but if you know your dog is prone to chewing, it will save a lot of money in the long run. The BiteGuard KennelPlex is constructed to handle extreme climates and withstand the rigorous activities of professionally trained dogs. These doors are used in kennels throughout the world and have a five-year warranty that includes the panels. If the BiteGuard panels are destroyed by chewing within five years of the purchase, they will be replaced. The Extra Large PlexiDor has a similar chew protection. Call us at 800-749-9609 for more information!