We had a practice alone training session this morning, where I just up and left with no triggers. I think the results were pretty promising! Of course, hounds would be muzzled if left for more than a few minutes. I was very pleased that Ferguson did not pant, and was able to stop staring at the door in an attempt to get Winry to play (even if it was unsuccessful), and went to chewing his bone on his bed. Had I not come back, I think they would have settled just fine.
Next to Winry, who, I promise you, does NOT have any separation issues at all, Ferguson's interest in the door looks almost normal :).
I'm thinking this might be more of the way to go; I leave practically every day for work with them being left out, so we'll just add muzzles to the equation and hope for the best with gradual time increase. This video did make me feel a good deal better though :-). Winry's presence really does seem to make a difference.
Ferg is still on fluoxetine: 20mg daily.