Evidently Sherlock thinks he is leader of the pack, therefore, you all, as just followers of the pack, aren't allowed to interfere with Sherlock's territory, i.e. Sal. You're going to have to take ownership of Sherlock's entire area in the house as well as Sal in order to restore balance. Dogs get out of balance and begin to exhibit difficult or neurotic or obsessive behavior when they don't sense you as leader of their pack and they feel they must take charge.
A dog who thinks he's taking charge of things should not be allowed any dominant behaviors in the house. Don't allow them to sit on you or on your chair, don't allow them to eat before you eat or any of the other dogs eat, don't allow them their toys or any rewards unless they are earning them by waiting patiently for you to give the command and then doing what they are told. Don't allow them to walk ahead of you when walking them, don't allow them out the door first ahead of you...ever. Walk the dog daily and make sure the dog follows you out the door, not the other way around and that he stays at your side or just slightly behind during your walk. Don't allow the dog to enter the house again before you walk ahead. The dog must wait until you signal that he can come in.
All these behaviors signal that you are the boss of the home, not the dog. Once that gets through his head, Sherlock will be a nice cooperative dog again. |