Thank you for the answer. I really love my mare, during shows she focus on the course and becomes a pleasure to ride! But in the flatwork or the warm up arena she gets really crazy with the other horses jumping or cantering near her and with some noises and when she sees something strange outside the arena!
It’s difficult to give you an answer without seeing the horse and the rider. We often think that spooky horses are difficult to work but it’s not always true.
The most important is to know your horse and do all the work at home. When horses are too nervous and spooky, they sometimes are difficult to control, and I personally don’t really like it. However, horses with a lot of energy and even a bit spooky are often really manageable with a lot of work and make really great sport horses.