Although a considerable amount of the canine footage is CGI, including "Delgado," leaping onto a moving train and fighting cougars, the work from the real dogs is nothing short of astounding. More than 200 dogs and 60 trainers were involved in the making of the film. And BHC trainers had to do more than just prep those 200 dogs: While filming on location in Mexico, torrential rain caused flooding and trainers carried the dogs to safety through the knee-high floodwater. All the dogs (and people) were okay.
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