Bitter Apple Spray is a spray that people use on their furniture so dogs will not chew on it. Dogs supposedly hate the taste of it. The Heffleys used it when they owned their dog, Sweetie. Manny loves the taste of the spray, and puts it on all of his food.
- Diary of a Wimpy Kid: Cabin Fever (First and only appearance)
- There is also a real life item called Bitter Apple Spray.