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Well look on Flickr under "most interesting" cow photos and you'll find there are three main kinds - solitary side on photos (cow portraits) that look like they are for a country show, shots where cows are shown in an awesome setting or shots where cows are doing stuff that's interesting. Yours don't really tick any of those boxes. When I see your title "out on the range" I would expect that they are in an interesting place, under a big sky. Try to convey what it feels like to be there with them, not just what it looks like.