I have an adorable yearling filly that I'm trying to work with, but I'm having a few problems. She is not a fan of being haltered, but we have gotten one on her a few times by being patient and gentle. Unfortunately, she's managed to get them all off. The barn owner, the vet and I have all haltered her, but with 48 hours, she takes them back off. We've done this probably 5 times. When she's haltered she is sweet, stands and leads well, and appreciates attention, but as soon as she gets them off, she's like a different horse. We have been using flat nylon halters. Would a rope halter be harder for her to get off? Any advice would be appreciated.