:o Not to worry it doesn't hurt! Also another way is to get a thining comb. My technique is get a small section of mane, brush the comb toward to neck of the horse (opposite way you usually brush a horses mane) keep doing that until you have some of the mane still left, wrap it around your finger and pull with some force. If you can't break it you have it too thick, it sounds like it hurts but none of my horses mind