|I certainly see a "Golden Ratio" here. It's a decently solid image; it's sharp, well exposed, etc. I might have preferred a color version, but that's really a preference thing. There's nothing "wrong" with the color treatment you chose I don't think.
S/he sure is cute. I can almost feel the softness of the fur and the sharpness of the straw. I feel like the newborn has more story to tell that isn't being told here, and I think the story is what would have given this image a better score. Right now this could be any calf in any barn, anywhere. It's easily forgettable. You say this was in a petting zoo, so what could be done to tell that story? The challenging part would be making a petting zoo look attractive, which is hard, I know, heh.