Most of the time, if not all of the time, the crews turn around and go back from where they came. A lengthy delay (2+ hours or so I would guess) would likely be a problem but I do not know the specifics when it comes to this. Perhaps someone with knowledge of pilots hours can add to this.

The one dog was not with a med student, the one with the vest on. I do think the other two were with med students as one had an AUC shirt on.

Bdallas was on the same flight, although I did not see him, as he commented last night about enjoying the delay.

SXMScubaman, e-collars are a great training device is used properly. They are not what you would typically train a service/support dog with. They are also dangerous to the dog when in the wrong human hands. I have worked with some dogs that seem to lose the ability or desire to bark as they have been so harshly trained.