My friend and I are going to take a liberty lesson with our minis. The trainer likes you to have rope halters with 4 knots on the nose for full size horses. She's never worked with minis before and says 4 knots probably aren't necessary. I'm hesitant to get a halter with 4 knots for such a tiny nose (you can get them made on Etsy). Advice? 4 knots or just the 2 side knots?