The softness is, unfortunately, real. I saw the gosling start to move and thought it would make for a nice scene, so I had to get the shot off quickly. The focus is a little soft as a consequence. The blur was added in PP as an effort to work with a soft focus image. It isn't a dof blur, since it blurs in the same focal plane as the goslings.
I think the softness and the "fake DOF" it is the result of PP.
Your focus appears to be in front or the birds were moving on you-- hide signature --
My photographs on flikr: http://www.flickr.com/photos/71572637@N03/