I am also having a horrible problem with Cody's separation anxiety. Less than 5 minutes after I leave, he begins to whimper for a few minutes, then it's all-out howling like someone is beating him for half an hour or more. It's absolutely heartbreaking. You can hear him 2 buildings over in our apartment complex. I also have a roommate, and even though he'll whimper for a few minutes when she leaves, even if she is there while I'm gone, he still howls. So I know it's the fact that I'm gone that causes him to do this. I guess since he eventually stops, it's not true SA, but it still wakes my roommate up in the mornings after I leave and annoys the neighbors.
I'm at a loss. At the moment, I am trying to keep him in his kennel a little more than usual. I also put him in there an hour before I leave, and when I get back, I wait about 20 minutes before I let him out. A friend has an ultrasonic bark control device that just annoyed him and made him howl more when we tried it. My roommate has joked about getting him a muzzle, but I'm pretty sure part of her isn't joking. I know it takes time, but there's only so much she and my neighbors can take before my apartment managers evict me or my neighbors call animal control.
Luckily there are only 3 1/2 weeks before we move. There, he will have a canine companion and a few acres to run around out in the middle of nowhere. Hopefully that will compensate for me leaving him while I'm at work.
Any and all suggestions would be MORE than welcome and greatly appreciated!