< This keeps popping up in my Facebook feed asking for support on Kickstarter.
Ummmm - how about NO THANKS.
Let's call it what it is, a torture tool. If you want your horse to pay attention to you, develop a relationship with him/her and get quieter, not louder with inducing pain. Sigh.
If you agree, head on over and report this campaign for the cruelty it is.