With what seems to be no provocation, our 12 week old GSD puppy from Czech lines has bouts with what looks like the human equivalent to dry heaves, however, the 'movement appears to start in the throat and not in the abdomen. he has consumed nothing in the way of chemicals and is not exposed to the Tucson summer heat save bathroom breaks for no more than 10 minutes at a time. these episodes do not seem to follow any pattern at all, is it as simple as something dry in his throat ( insect, grass) that is common with all puppies and their incessant desire to experience everything with their mouths and taste buds?