The horse I ride has a bad habit developed by the owner bee many years that whenever they are in the open and/or hills she has Been allowed to gallop up every bit and I'm trying to stop her doing that. She knows whenever we go to certain spots especially she can go for it and it is becoming annoying and not particularly safe either. Any ideas? I've tried to walk her often. But she throws her head round and starts side stepping backing up and not responding well to the stage I have to hop off before I fall off.. She's really good in the arena but just hard to manage in the open and actually have fun. She's about 12yo and a kaimanawa living in an area with many hills and very little flat ground.