Puppies chew when they are teething, but older dogs often like it, too. It feels good. It is soothing and it is a stress reliever.
Solution: Offer toys with a variety of texture that they really like and praise them like crazy when they chew it. Show your dog that they are doing something right. To proactive, put any items you want to keep safe in a secure area. Dogs can be really skilled at finding things to chew, so use child lock and baby gates if necessary to create a dog-proof area free of temptations.