Here is a copy of Randi's correct guess:

Most destructive chewing occurs just before the owner returns home. The dog is anxiously anticipating the owner's return and this energy is released by chewing. You can prevent your dog from indiscriminately chewing whatever is handy and instead chew her own toys. Whenever you return home, insist that your dog greet you with a toy in her mouth. At first you will have to help her by telling her to "find" her toy. Do not give your usual home coming greeting until she has a toy firmly in her mouth. Within a few days, your dog will realize that you never say hello unless she has a toy in her mouth. Now when your dog starts anticipating your return, she will automatically begin looking for a toy with which to gain your greeting and approval when you do return. If a toy is already in her mouth, she will be likely to chew on it, rather than on the furniture, to release tension. ~~ Gwen Bohnenkamp, "Manners for the Modern Dog"

Well done, Randi!!! Do you wish to host/hostess the next puzzle?

The original puzzles all had a dog theme, but I think opening it up to all creatures would be a nice touch -- maybe move it to Pet General. Do the current puzzlers agree?