Rex
Rex is based on the true-life story of young Marine Corporal Megan Leavey (Kate Mara) whose unique discipline and bond with her military combat dog saved many lives during their deployment in Iraq. When she is assigned to clean up the K9 unit after a disciplinary hearing, Leavey identifies with a particularly aggressive dog, Rex, and is given the chance to train him. Over the course of their service, Megan and Rex completed more than 100 missions until an IED explosion injures them, putting their fate in jeopardy. 2017 DOGS OF WAR LLC
Starring Javier Aparicio, Sergio Marinoff, Juliana Muras
It's a action & adventure and crime movie, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Australia.