To me it is looking like that red line leads to where her heel actually makes contact with the ground. That’s a lot of foot behind that point pushing down further driving the heel forward. The traditional method is to add a small wedge, some people do it barefoot, some do glue ons. I’m not a farrier and don’t want to pretend to be one but it looks like you’ve got a very long heel but it isn’t providing much stability or support.
Do you have a front on view of the feet?
My hope is that when the farrier is scheduled I’m thinking “seriously? Let me check my calendar. The feet look perfect”. By the time things “look long” what you’re probably seeing is foot distortion and then each appointment is trying to bring the foot back to balanced rather than maintaining balance.
I do 5 week cycles. Financially it sucks but I notice a big difference in balance and hoof quality.