I don’t know the answer to this question but I do think it is a very interesting situation. A client had two dogs. The Beagle was about six years old when the Weimaraner arrived as a puppy. In the house was one human, two dogs. The dogs were best buds and there was never an issue between them. Sadly, the day came when the Beagle shed his canine coil. For the next two years the Weim carried on life without her friend. Then out of nowhere the Weim started showing signs of separation anxiety manifesting itself in the form of damaging property. The damage was limited to the trim/molding around doors. There were several attempts to stop the destruction by trying to block the door with a chair, spraying the trim/molding with foul tasting sprays, putting a baby gate up to stop access to the back door and chewing, music left on, drapes open, drapes closed, Kong stuffed with frozen treats and some form of tranquilizer – nothing worked. Frustration of the owner grew. The solution was to put the dog in the care of a walker for days when the human was working. That worked fine. There was no damage because the dog was not in the home to do damage. The dog would be with several other dogs during the day and all was well. After running and romping in her group, digging, sniffing, barking at squirrels in trees, chasing birds, she would go home and rest. Tired dogs are easy to manage. At home however, when the Weim was rested and the human went out even for a short time, the destructive behaviour would rear its head. What is the solution? I suggested another dog. No way was the response. Too much work. The pattern of destruction continued until human tolerance levels and patience levels and denial levels could not be raised further. The solution suggested earlier, perhaps driven by frustration and desperation: was another dog and another dog was finally acquired. Since the new dog arrived on the scene there has been no property destruction or any other unwanted behaviour. The two dogs have quickly become best friends. They run and chase each other and play outdoors and indoors and sleep together.
Why did the meds not work? Why did the presence of another dog cure the destructive behaviour?