It's In the Genes: Father and Son Earthdogs

Credit: Jill Arnel
article: Earthdog Tests Measure Instinct 		Other images from this article
Terrier at the Take-Out Handler and Dog on Deck Handler Watches as Dog Enters Tunnel Dog Upon Descent Underground It's In the Genes: Father and Son Earthdogs
It's In the Genes: Father and Son Earthdogs, Jill Arnel