Poor Barney has worse problems now. He goes into these choking gags sometimes when he's outside or gets excited. The separation anxiety makes it worse. The vet thought it was "reverse sneeze" which small dogs sometimes get. It sounds awful but doesn't really hurt them. Now I'm beginning to think it's actually a collapsing trachea, which is worse. When I checked on him today he got so worked up when I walked in the door that he had a series of episodes where he seemed to be gasping for air. It was the scariest sight. He's better tonight now that I'm home but he still snorts a lot. There's definitely something respiratory going on with him. I hope it's not a collapsing trachea. I made a vet appointment for tomorrow morning, so we'll see. He's such a sweet, lovable little dog. It breaks my heart to see him suffering like this.