Pro Chill is Right!
I tested this out at home on my 2 mares. Per the instructions, I gave half a tube to each mare. Out of all the calming pastes I've tried over the years, this is definitely the strongest I've used. I recommend using this paste when your horse is at their worst anxiety wise. If your horse is only mildly anxious, I'd try a different one of the Perfect Prep pastes. I'm definitely keeping this on hand!