Well, Odie has alays done something strange, that I think it's collapsible trachea, but I've never confirmed it, and tonight I could catch it on video for the first time so you can see and tell me what you think. I feel so bad for him, whenever he does that I run to him and cuddle him. He usually does it when he's running around on when I have him on the leash tied to his collar (Most of the time I use a harness on him cause of this). Also when he gets overly excited he also does it. But simetimes he does it for no reason at all, like tonight... anyway... here is the video, let me know what you think.
YouTube - Odie's collapsible trachea?