Hiya Jonathan,
I'm going to go against the grain here, sorry. I think your idea is good, but to me the subject and colour combination you have chosen just don't do it for me.
I have been backwards and forwards to this trio shot since you posted it, to see if my thoughts changed, but unfortunately not.
However, I'll explain to you why it doesn't work for me and what I think would look good ....
Firstly, the doggie is very cute (the focus on the eyes is a tad soft ... but not sure if that is just the colours playing tricks).
Personally I think that with this particular breed of dog it would have been better to maybe have a colour shot, then a b&w shot and finally a sepia shade.
However, I think the colours you have chosen would have maybe worked for a breed of dog such as a Dalmatian, where there is distinct b&w in the coat.
Have to agree with Michael too about a black border to set it off.
Otherwise I think your idea is good, so I hope my critique doesn't come across as negative.
Now to wait for the announcement of week 11 (wow these weeks are flying past).
Cheers
Dawn