The following is a list of breeds where the Whitehead trait can be observed.
List compiled by Corinne Benavides-Gyger
Note - it is not yet known if Whitehead is the same trait in all breeds and/or breed groups.
Australian Shepherd, Border Collie, Bearded Collie, Cardigan Welsh Corgi , Pembroke Welsh Corgi, Shetland Sheepdog, Old English Sheepdog, English Shepherd, Miniature American Shepherd
Livestock guardians and Mountain Dogs
Bernese Mt. Dog, Greater Swiss Mt. Dog, Saint Bernard
Jack Russell Terrier, Fox Terrier, Bull Terrier
English Bulldog, Boston Terrier, Boxer, French
Bulldog, American Staffordshire Terrier, Staffordshire Bull Terrier, Alapaha Blue Blood Bulldog, American Bulldog
German Spitz Mittel, American Akita, Yakutian Laika, Icelandic Sheepdog, Finnish Lapphund, Karelian Bear Dog
Beagle, Springer, Catahoula Leopard Dog, Basset Hound, Welsh Springer Spaniel, Spanish Water Dog
Tibetan Spaniel, Cavalier King Charles Spaniel, Chinese Crested, Papillon, Japanese Chin, Shih Tzu, Tibetan Terrier
Ibizan hound, Whippet, Greyhound, Italian