S1·E2 – Rottweiler, Boston Terrier, Bassrt Hound, Shar Pei, St. Bernard

Karen Halligan

Herself - Chief Veterinarian

Joey Villani

Himself - Dog Grooming Expert

Cherise Clement

Herself - Resident, Small Animal Studies

Nicholas Dodman

Himself - Veterinary Behavioralist

Kevin Draine

Himself - Narrator

Zak George

Himself - Dog Trainer