In my experience, a nosenet, my horse is a seasonal headshaker, and its the only thing that works, that and the myler combination bit, she is a million times happier a different horse, only shook April-June/July this year instead of March-September last year, and year before. First year I had her, she didn't do it at all. But I moved her from Yorkshire-Hampshire when I bought her, and moved to Yorkshire this time last year, so could be something pollen related in Hants thats not here, will wait and see what happens in the spring. But the nosenet is my nose saver!!!