This is really a great idea but I gotta know how it would have been any different had you just taken a step or two backwards and accomplished this in one shot not needing all the extra work?
This technique is about blurring the foreground fence, which means getting as close as you can to it. If you back off, the fence would become more visible again. That's typically an impractical amount of work to PS out. Besides, the work required is minimal. The pano function in PSE is pretty much fire and forget. Add the files, push go and assuming the quality of the input is good enough, you're done. Just have to hope the subject doesn't move too much during the pano, and you don't move to cause the background to shift.
I have also done wildlife subject panos for a similar but different reason. Sometimes I just run out of zoom range on the 100-400L, and stepping back is not possible for many reasons, nor is 2nd camera with wide angle on it available quickly enough. My only alternative is therefore to take multiple shots in rapid succession.
Canon 1D, 300D IR, 450D full spectrum, 600D, 5D2, 7D, 7D2, EF 35/2, 85/1.8, 135/2+SF, 70-300L, 100-400L
EF-S 10-18, 15-85, MP-E 65, Zeiss 50/2 macro, Sigma 50A, 150 macro, 120-300/2.8 OS, Samyang 8mm fisheye