The human-canine relationship is the longest and most successful interspecies relationship in documented history.
(Ha and Campion 2018)

First Friend Fact #48

Tony Bierman, "First Friend Fact #48," OBTESA, Accessed April 3, 2025, http://esbt.us/3b.
Black and Tan English Shepherds
Old-fashioned Black and Tan English Shepherd Association
The human-canine relationship is the longest and most successful interspecies relationship in documented history.
(Ha and Campion 2018)