I was told to get a prong collar for Sierra because she pulled so hard when I tried to walk her and she's so BULL HEADED!!!!!
But I just couldn't stand the though of those prongs on my little baby girl's neck!
So I did something better. I made it my mission in life to teach her how to walk on a leash with out pulling!!!
It took a lot of time, and she's still no angel but she much better!
Dog behaviorists will tell you to use what ever tool helps in order to get and keep their attention. If it works, then great! Just make sure you are not doing any damage! Sometimes dogs will be so "Locked In" on something and will be pulling and pulling trying to get at whatever it is, and it wont' even faze them that the prongs are digging into their necks! That's when damage can be done. You could always get the rubber caps that you can put on the ends to make it a little less intense.