I saw this guy and a few others hanging out on the side of the road yesterday.
Musk Ox B&W by
mrkramer, on Flickr
I was playing around with editing it, and decided to go for mostly black and white, but leaving in a bit of green where the new grass is starting to grow, I'm not sure if that was the best choice for editing, and I'm definitely open to comments or critiques.
First off, ask for "constructive critiques!"
Personally, I don't think the selective colour being left in place of a little bit of the green grass has worked effectively here. Selective colour usually works well when it highlights a subject or part of a subject within an image and here, the Musk Ox is the subject, not the new season grass. Had you have taken a different image, where the grass was the main focus, it could have worked.
If you really want to play with selective colour here, I'd make it the Musk Ox in colour and all else in B&W.
From a technical point of view, try spot metering on the Musk Ox next time, this way it should have all the detail to it, avoiding the blocked up shadows that it currently has. If the background blows out that doesn't really matter, it is after all an image about the Musk Ox first and foremost.
From a composition point of view, getting yourself much further over to the left would have allowed us to see the eye and face detail better. I realise that sometimes we can't accomplish these things, what looks like it may just require moving twenty metres to the left could in fact be moving a couple of hundred metres to the left and there could be obstacles in the way, making it impossible. Nonetheless, always work your subject as best as you can.