answer:What breed of dog do you have and how old is your dog? Certain breeds, need constant activity and exercise (like border collies-are working dogs). If your dog is relatively young or a puppy (1–3 years old), this type of behavior is not abnormal. I would suggest trying the use of bitter apple (which can be bought at pet stores) that makes things taste bad to dogs and not want to chew on them. I would also suggest that you let the dog know when his behavior is not acceptable, for example chewing on the sofa. This can be done by using voice inflection. Also make sure the dog has its own toys that its allowed to chew on and scold when he/she chews on items that are not approved items. And obedience training is always an option if none of these methods work, but also consult you vet for any tips or advice too. Good Luck. R