Dog Training – How To Stop Biting – Luna the 13 week old Red Husky. Luna is my friends dog and he let me film her to do this video. She is very playful and loves to bite. They have a spray that is called Apple Bitter. It does not harm the dog in anyway but they don't like the taste of the sour apple. Most pet stores should carry something like this. Thanks for watching and peace to all of you.