Table 1. Demographics of the dogs participating in the pilot study.

	Pilot Study Interviews (N = 15)	Pilot Study HSD* Group (N = 16)	Pilot Study nHSD** Group (N = 10)
Breeds	4 Australian Shepherds	4 Australian Shepherds	1 Border Collie
	2 Duck Tolling Retrievers	2 Duck Tolling Retrievers	1 Eurasian
	2 Mixed breeds	5 Mixed breeds	4 Mixed breeds
	1 Flatcoated Retriever	1 Flatcoated Retriever	1 Flatcoated Retriever
	1 Labrador Retriever	1 Labrador Retriever	1 Irish Terrier
	1 Lagotto Romagnolo	1 Lagotto Romagnolo	1 Sheltie
	1 Scottish Terrier	1 Scottish Terrier	1 Scottish Terrier
	1 Miniature Poodle	1 German Shepherd
	1 Tibet Terrier
	1 Vizla
Age in years (Median & Range)	4.8 (0.5–10)	5.3 (0.5–10.3)	5.9 (1.4–12.8)
Sex	5 male intact	8 male intact	2 male intact
	8 male neutered	4 male neutered	5 male neutered
	1 female intact	3 female intact	3 female neutered
	1 female neutered	1 female neutered

* HSD = highly sensitive dog;

** nHSD = not highly sensitive dog.