Here's a real "quick n dirty" example of selective gussian blur on the image to give the impression of shallower DOF to focus more on the chain...as Wolf said however it all depends on the context you want to show the subject in. If it's possible, go back and take more shots of this using different settings on your camera, such as larger parture for DOF and from a lot of different angles...you have a good eye for spotting the potential in this.