My dog had a panic attack today for the first time. She was very anxious when we first got her two years ago and had improved dramatically. But over the last month she's seemed a bit more anxious. There's been increased household stress due to her sister, a 14-15 year old pittbull who is aging and having more problems--maybe that's why. Anyway, wow, what an episode. She's doing a lot better, but not completely back to normal. It will take a while.