I have a 4 year old quarter horse who I started as a barrel horse but absolutely hated it. However, she loves to jump but I'm worried she's still a little bit too young as I've heard not to start her over jumps until she's 5. She's still going to need a lot of ground work english before she's really ready, but would I damage her joints by taking her over small x-rails? She's never going to be a big jumper so I was wondering if it was okay to start jumping her over smaller stuff before she's five.
Also what boots do you think would help minimize the stress on her legs?