I don't know if this has ever been listed but I saw this tonight.
http://www.imdb.com/title/tt0972883/ "Red"
"An older, reclusive man's best friend and inspiration for living is his 14-year-old dog named "Red". When three troublesome teens kill the dog for no good reason, the grieving man sets out for justice and redemption by whatever means available to him."
I really enjoyed it. As for one who adores animals I could feel for the old guy. I felt myself entrenched with sympathetic feelings from the start and throughout the movie. I thought Brian Cox gave a good performance along with the supporting cast.
Recommended!!!