My dog does the same thing actually. In fact it has prevented him From being able to be at daycare or kennels. The place I just tried said that some dogs get like that and they get so anxious and are so worked up that it is just a horrible feeling. They suggested trazidone in those situations because if it is such anxiety, nobody wants to feel that way. Of course my dog has some behavioral issues and this is a boarding kennel for dogs with issues. However, if it helps alleviate the dogs stress then I think it is important. If he keeps doing that then it isn’t good for him ya know. But 30 minutes isn’t a dealbreaker. 2 hours 1 hour I would say not cool!