I have removed spurs before with the pliers and twist method and it has worked well... but yesterday I tried it for the first time on my main Rooster and it didn't work?!? Spur didn't twist and it bleed at the leg... I felt really bad... does it not work on all roos? Finally cut and dremeled them down a bit so he is fine but now I hesitate to try it on other roos? Thoughts?