I like the placement of the cow. It is a very beautiful spot that you have photographed and I think that including the cow has added a great focal point and has related it nicely back to this week's topic.....Nice one!
Wow neat shot. The fog works well here. The grass in the foreground seems a bit overpixelated. Maybe it's just me. I love your composition with this and the photo would not have been the same without that cow. Nice work.