I have only had one Simpson brush out of 6 total that did not shed on the first couple uses. All have stopped shedding post second use however. To me, if a brush sheds a few hairs right away it is ok. If it continues, it's a problem. My Thaters, Kents, Vulfix, and Vie-longs were not shedders even on the first go. Others have been but all have stopped.