Q: When our dog was a puppy, she chewed the wood by the French doors leading to our deck. As time went on, it got progressively worse. Now a piece of the wood has fallen out and the area around it ...

Wood anywhere in your home is vulnerable to decay in the form of either wet or dry rot (both of which are actually fungal infestation). A rotten wooden door, floorboard, section of trim, window sill, ...