Preventive training means you try to prevent your dog from exhibiting inappropriate behavior by keeping an eye on him when he is with you, or by keeping him in his crate or a puppy/dog-proofed area when you cannot keep an eye on him.

The methodology behind this type of training is if your dog does not get an opportunity to exhibit an unwanted behavior, you do not have to modify his behavior or use negative training methods. This type of training requires more participation from the owner as far as constant supervision and consistency, but in the long run, preventive training is far less stressful on both owner and dog. This training method has two advantages:

     Dogs often chew to relieve stress and excess energy. If your dog chews on something that is off-limits, say "no" or "eh" in a low voice. Then immediately give your dog a safe chew toy. Praise him for good behavior. Remember to give your dog safe chew toys instead of old household items like old shoes, because that could encourage him to also chew on new shoes. You will also want to avoid rough play and games like "tug of war" as this can encourage aggressive behavior.