All is good now. No worries on my end, anymore. Will just treat her as a horse, like she has no underbite, but always keep it in mind, that she may need a different bit, due to it or something, and will plan on having yearly check-ups, which I would of anyway, and let the vet decide on when things need to be done with her mouth. Didn't realize how common this seems to be in them.
Thank you everyone, who took the time to respond. I really appreciate it.
Thank you everyone, who took the time to respond. I really appreciate it.