I have a 6 week old boston terrier part of a liter of 8 they have had their shots wormed and this one puppy will act as if she cant get her air once in a while and sneeze then spit up clear fluid she takes antibiotics but for what i dont even know whats causing this most of the time except during these spells shes great she eats drinks plays and poops no blood no mucas no cleft pallet when she does this she gets drowsey and slleps it off after about 3 hourse or so shes ready to play? I dont know whats going on i cant find any other puppies that have had this her vets treating it as if it were a allergy? is it?