Mastiff

The story Mastiff wasn't very interesting to me honestly. I got out of the summary that the main characters were a man, woman and a dog in which he was a mastiff breed. It seems as the woman, never married and works at a art gallery or photography and her boyfriend is a scientist. they don't seem to be having such a happy relationship with one another. I'm not sure if he doesn't show her much affection or has time for her but they go on a hiking trip in which they are attack by the dog mastiff.