Christian fiction is not usually my thing. Often it is badly written and overly pedantic. (I am for religion but against bad writing of any kind) I made an exception for The Dog that Whispered, and I am glad I did. Thurman, the dog central to the plot, is quite a charmer, and it is a pleasure to see how his good nature and guidance transforms Wilson Steele's life.
We often forget or outright ignore the suffering our vets go through. Even those without physical injuries have to endure the memories of the horrors they observed or and were forced to enact. Wilson Steele is existing, teaching classes and going through the motions, but he doesn't really come alive until his aging mother forces Thurman upon him. Religion does play a large role in The Dog that Whispered, but it isn't as exaggerated a presence as in some Christian fiction. It fits the story and the subject.