Well bred dogs don't need to drool. It became 'common' in the 1980s when breeders tried to get a 'better' head shape. Gt Danes, most of the larger herding breeds, all affected. Even the Lab pup; used to make my guts churn. Spinones are known for it, apparently one can paste walls B4 applying wall paper
. Which is why I didn't buy one.
Some breeds had heads totally out of proportion with the body mass. In the Show ring
. Judges obviously not reading the Standards!!!