You're getting a rather impressive collection of underrated photos. The processing places the focus exactly where it needed to be to fit the challenge and is especially well done considering it's a basic challenge. Usually, I can guesstimate a score within a few tenths of a point, I would have been way off on this one.
I like the dark tones (editing) in the picture, great composition and a great background choice. Nicely sharp as well! Don't know if this would completely meet the challenge in my books though, borderline on DNMC! 6
Not really sure this meets the challenge. Honestly, this doggie doesn't look aggressive to me, he or she looks to be playing. Maybe I've got the wrong impression?