TIP #1: CHEW ON THIS!
You can reduce the risk of damage to occasional ill-gotten items by teaching your pup to exchange toys for treats, using something he loves that he's allowed to have, such as a favorite chew toy or a food-stuffed Kong.
The key to this game is he learns that if he gives something up, he gets something better in return and he gets the original thing back as well. Two rewards for the price of one! Then, when he has a forbidden object, he's more likely to bring it to you to trade than to drag his prize to his cave under the dining room table for a leisurely chew. The rare occasion that he doesn't get "the thing" back won't be enough to overcome the programming you've done by playing the "trade" game with him frequently.
In order for this to work, you have to stop playing "chase the puppy" when he grabs the sofa cushion or some other forbidden object. This is often an attention-getting behavior; he's learned that grabbing "your" toys and dashing off with them initiates a rousing play session.
Here's what you do:
TIP #2: PLAN AHEAD BEFORE BRINGING HOME A NEW DOG
Living with multiple dogs brings a whole new set of challenges. Adding a second (or third, or fourth) dog means more fun, more love, more joy and more wonderful doggy companionship. But it also means much more from you: more time, more money, more energy, and more working through problems.
Pay attention to the type of dog that your dog "likes". While many puppies and young dogs play with just about anyone who will engage, mature dogs often have a few select "friends." Notice the personalities of your dog's friends. For example, pay attention if your dog generally does well playing with quiet females, but avoids rowdy adolescents.
When choosing a new dog, if possible, have the dogs meet each in a neutral location before making a decision. Pay attention to how they respond to each other. If your instincts tell you it isn't a good match - no matter how much you adore the potential new dog - keep looking.
- Whole Dog Journal
Jeff Dentler, CPDT-KA, IAABC-ADT, FFCP, CTDI