I think we’ve worked past the worst of her nasty habit. Letting her step on her own lead line was probably the best idea I’ve had in a long time. It worked to the point that, while I was working with her feet, I watched her head go up and she looked like she was thinking about maybe having a problem. I gave a quick tug on her lead line to remind her I was there and she seemed to just change her mind and opt to stand relatively quietly instead. I immediately gave her foot back for a moment, gave her some praise and continued with that foot.
She hasn’t gone over since June 17 and while I hesitate to say the habit is broken, things are looking pretty positive.
She’s also on her way to spend a month or two at a trainers to learn some extensive ground work, which should help cement in her brain how to be a good baby horse. Her best friend is going for some saddle training at another trainer, so we figured this was a great time to send her to school too.