I had a mare that was very violent with her head if you tried to clip her. I spent the entire winter with an electric toothbrush. It is quieter than clippers, but still makes noise, has vibration and the tickle effect. Started off on her body then the neck moving on to her head and eventually into her ears. Slow process but I felt safer using the toothbrush since there was no cord to get in the way, if she did run into the edge of the toothbrush there was much less chance of an injury since there are no sharp edges.