The only thing that isn't clear, was there anything in the prosthetic leg to create or simulate body temperature? As we know that most snakes have heat sensors sensors and temperature is integral to the response. Ball pythons will not react the same to a room temperature prey item as they will a heated item and even more so, a live item. It's a variable I don't think can be ignored. If it wasn't accounted for in the research there could be some flaw in the methodology. Otherwise an interesting report.