Chewing is Frustrating.
Does your dog chew constantly? Whether you are there or not? If so, there may be several reasons for this frustrating behavior. If you have a puppy, one reason may be teething. If your pup is teething, take one of their rubber toys and put it in the freezer. After an hour or so, take it out and give it to the puppy. This has a calming effect on the pup and has a numbing effect on their gums and teeth.
But, for the adult dog, there is probably an underlying problem. If you have a dog that isn't as active as they should be, boredom is probably the cause of their chewing. Giving your dog something to occupy their time is very important. While you are gone, toys like the Kong are great. Also, the Busy Buddy toys, carried at Just Dogs! Gourmet in the Huntington Mall, Barboursville, WV, are great, too. The Busy Buddy's hold treats and makes the dog work and think of how to get them out of it. Also, leaving a radio or TV on will help with the boredom and can have a calming effect on a stressed dog.
If you notice your dog panting excessively when you return home from work or running errands, he/she is most likely experiencing a panic or anxiety attack. Yes, dogs can experience attacks just like humans. Consulting your vet is your best option if you are afraid your dog is stressing out. There are meds out there, both prescription and natural, to help calm your dog's anxiety. But never administer meds without consulting your vet first.
Does your dog chew your child's toys? If so, they are not being spiteful, but just enjoying the remnants of juice and cookies. Dog's also chew by scent. I know of one incident where a mother dog chewed up the blankets from her whelping box, after they had been washed, because they still had the scent of her puppies on them. Scent is strong and a dog's nose is 100 times more sensitive than ours. There are predictable triggers to chewing. You just have to find out what is triggering your dog to chew. A video camera, if you can afford it, will aid you in finding out what is going on with your dog. If a video camera is not feasible, as it usually isn't, just watching your dog will help you figure out what is going on with them.
Teaching what is right and wrong is the key and a must. I use the command "no chew." Some use the term "leave it." Either is fine and whatever you are comfortable using. If your dog is chewing something they shouldn't, go over and pick up the item, using the dog's name and the command "no chew or leave it." Put the object up. If it is a toy, put it up for 15 min. and ignore your dog. They will do everything in the world to get your attention, but ignore them. After the 15 min. has gone by, get the toy and give it back to them. If they play with it correctly, praise them and give a small tidbit as a treat for respecting their toy. If they are chewing on, say, a couch leg, remove the dog from the area, using the terms I said above and give them a toy they are allowed to have, praising the dog the minute their teeth touch the toy and give a small treat.
Hopefully, some of the things I have said will help if you have a chewer in your midst.