It is generally thought that chewing releases endorphins which are considered nature's feel good hormones. Dogs who may be stressed or anxious are often thought to be chewing more to release some of their stress through this activity. Dogs use up lots of energy by chewing and for many dogs using their teeth and mouth can release pent up frustration . A much better way to do this than with a suitable chew toy than your lovely furniture! So consider how your dog releases his or her stress as they cant tell us , or write to us and for dogs who love to chew it actually may be a necessity to deal with how they feel.. Adult chewing of home items can often be related to boredom or anxious so if you think that this might be the case consult a professional who can help you.