My puppy is a jug and just exhibited that behavior this morning... of course I freaked out and called the vet thinking he had worms... the vet said that ninety percent of the time it is something else. I made him an appointment for next week... she s...

I am no expert and am working with my own puppy, but animals are extremely perceptive... you said he got scared... what exactly scared him? Maybe a threat you were not even aware of ... my 5lb.