During teething time provide things for him to chew on. For example, soak old wash rags in water, ring them out, and put them in the freezer. Whenever he has a need to chew on you or the furniture, give him one of these wash rags to work over. Provide a box filled with chew toys such as nylon bones or hard rubber balls.

Also remember that your dog learns trough pleasant or unpleasant experiences .

so the use of repellents will help with very strong headed dogs , and at the same time , i use the opportunity to start them in anti-food poisoning training .

So they wont accept food from strangers , so we use a very hot Mexican sauce made with hot peppers , that later on you can apply on the furniture that they have been chewing and believe me they stop destroying your carpets , furniture , plants or whatever they have been destroying .

Every single piece of advice that i suggest to re-program behaviour must be introduce after obedience training is been completed in order to have effectiveness and durability