When im body clipping and they are being big brats, i normally give them a shot of Dormosedan (I call it Dormo-Satan
), but ive luckly only had to use that on one taller shetland filly. For the most part, i can push the minis around just enough to get them done, but its different when your clipping a shetland filly that can outmuscle you easily.
But, for trimming hooves i dont think you would need any real sedditives. Im not a big believer in "natual herbal" suppliments. Handle her feet normally ext like said above. But she may still get nervous when the farrier is a stranger and comes around with all the tools ext so maybe throw on a twitch?