You can read about long faced dogs in Sarah Holloway's fascinating report
on dolichocephalic dog breeds.
This date and
the dolichocephalic configuration (narrow and oblong viewed from the top) of the skulls has led researchers to classify them both as H. erectus.55 - 57
For example, the skull shape of some breeds, including
the dolichocephalic Scottish Terrier or the brachycephalic Japanese Chin, appear to be caused by other genes.
Mesocephalic (Staffordshire Terrier, Labrador) and
dolichocephalic (Whippet, Collie) dogs have one, or more commonly two, copies of the ancestral C allele.
The third is
the dolichocephalic.
Among dogs,
dolichocephalic (long nosed) shepherd - like dogs, bred for herding and guarding as well as spaniels and setters more commonly have the condition.
This type of bull terrier is
a dolichocephalic breed because their facial skeleton tends to be long in comparison to their cranium.
These terriers belong to a class of long - headed breeds which puts them in
the dolichocephalic category.