No, I bought the collar, because it doesn't hurt, it just startles her! I used it on myself, before I ever even bought one! Actually, my husband and I both did! It is only used, when she runs off from me! It is on the lowest setting! A lot of rescues, won't even allow a dog to be adopted, if they don't have a fence, or a shock fence, which is the equivelant of what Callie feels, if she runs off! My dog is also part Catahoula, and if she doesn't get to run, she isn't happy! It is the only way to get her to come back. Like I said, I have had the collar for several months, and have only used the shock three times. one time, when she took off after a deer, one time, when she was racing for the road, and the last time, was when she disappeared up over the hill, chasing wild geese! The rest of the time,she comes from the five beeps on the collar! The sound function! Believe me, if it hurt, I wouldn't use it!