Our Bassett Hound has started having anxiety attacks at nite---shivering, quivering, teeth chattering episodes. It is sad to see--not to mention sleep disruptive. Friends have given lots of advice and it usually makes mention of a Thundercoat. To me, that sounded like quackery but we were desperate and finally bought one. And incredibly, it worked. No more shivering at night and his waking episodes are coming to an end. It is just a snug, soft body wrap---sometimes I wish they had them for humans!