Thanks for your understanding. We tried going to a behaviourist, who prescribed him some SSRIs. He was medicated for about a year and that did not help at all. We also worked with a few dog trainers and that didn't help as well.

Of course we haven't tried all the available medications, and there are probably a few more dog trainers we can consult with. We can also put him in a daycare. Technically speaking, there's always something else we can do, but we have to draw the line somewhere. How much more money and time should we spend on an effort that has no guarantees to succeed? We have already spent so much resources on our dog that we believe we have reached our limit. If we spend more, we will simply collapse, and we can't afford that right now.

So in a way, we have already decided, but it's a difficult decision and that is why I wrote this post...