Do you agree with the rule that says that any drug used with the intention of artificially altering/calming the horse’s behavior is not legal for showing?
… what’s the difference between a drug to muffle a reaction, and a piece of equipment to muffle a reaction?
I take my horse places other than shows, so that when we get to a show it’s not a total bombshell getting dropped on her. I set up situations at home to practice reactions to noises - popping balloons, snapping whips, blasting the radio, walking her around when the tractor is putting up hay instead of avoiding the situation, hammering in a board with her on a leadrope right there to watch, setting up and putting away poles with a clatter… That’s what training is - doing the work beforehand so that when it’s time to get in front of a “judge”, she has the tools to cope with whatever should come up (judge being “go time” be that a hack out where deer come blasting out of the woods, or an actual show). And if she reacts to something, my reaction isn’t to muffle whatever it is that scared her, it’s to recreate it again and again until the correct response is conditioned in.
If you would rather just muffle the sounds and avoid the training portion, that’s your prerogative.