I can totally relate to your problem!
Jaden has the worst seperation anxiety! I can't even go into the bathroom for two minutes with the door shut without him spinning in circles, crying and barking.

I've tried everything, every homeopathic thing out there, Rescue Remedy, Calm Ease, and about 5 other things, none of which did anything for him. It's gotten progressively worse, he works himself up into a frenzy and if I have to leave him when I come home he's panting, his heart is racing and he is SUPER hyper for me to be home. I used to put him in his crate but his newest thing is he's started defacating due to his anxiety when I leave. The last time I left him in his crate and stepped outside for 20 minutes, when I came back in he had deficated in his crate and covered himself in it
It is the most frustrating thing and it has gotten to the point where I have to take him with me just about everywhere.

I don't mind bringing him along but I just wish he wasn't so attached and could enjoy life without me for 10 minutes. I talked with a behaviorist and he suggested a bunch of differen things. Stepping outside for thirty seconds and coming back then increasing it to longer periods of time, giving him something entertaining to play with, something tasty to chew on, leaving music on, leaving a tape on with my voice on it....so far nothing has worked

I even got him a new baby sister this past December to keep him company for the few hours a week I have to be gone and up to this point, even that doesn't seem to be helping all that much. I am going to speak with another beahviorist, supposed to be an expert in his field and we are driving 6 hours to speak with him. I am hoping maybe he can shed some light on this, I hate to drug him so I've been trying everything else first, however, if nothing else works I suppose I will have to look into prescription drugs and see if I can find something that is not harmful that would help him to live a calmer life for the few hours I am away...
Please keep in touch and let us know how your little one is doing. I know I don't have a lot of advice to give to help you but wanted to let you know that you're not the only one going through this.
Hugs,
Joy