I love the feel that your low angle and shallow DOF give to the photo. The OOF strip in the sort of frames the duckling. You have a good pose here, head angle and eye contact are good. I also like the drop on the tip of the bill. Taking him out of the center also improves the composition. I would suggest adding a little head room. I get the impression that he is ducking the top of the frame.
Cute, and I like the low angle. Personally I would have chosen a slightly higher angle here to avoid the dark part in the upper-right, as I do find that part a bit disturbing. Perhaps you could darken your midtones a bit to give the photograph more depth, as it looks a bit flat.
I like the soft light and eye contact. While a low angle works almost always well, here a slightly higher angle would have helped to avoid the grass in the foreground partially cover the legs.