I love how he points out that we as human caretakers of dogs must be very mindful of our energy and how we so greatly influence our furry friends.
I have heard of dogs choosing to not be kind (as we humans perceive it) and these dogs had been very abused by humans. Animal communicators have had conversations with these dogs that for example do bite humans and the animals have been told that they will have to be put down if they continue to bite. The animals' response has been that they will indeed continue to bite, so please let them leave their bodies right away. They are thankful to leave, as they have chosen to no longer be kind to humans. These must be cases where fear is not being resolved on the dog's side, as you mentioned.
I too believe it is an honor to be a human caretaker of a dog and they do teach us so much if we are open to receive the gifts from them.