Question: what is dewlap in a dog?
Answer: One feature that contributes to the “typiness” of certain breeds is the “dewlap.” Laymen will refer to it as the loose skin hanging around the neck and throat on breeds like the Basset Hound or Bloodhound, but other breeds have dewlaps, too, and they have a purpose. ... When a dog pants, air descends directly to the lungs.