I think it’s time for you to learn how to trim It’s clear this farrier has no idea what he’s doing.
All those event lines are from repeated inappropriate pressure on the walls from the unbalanced trimming.
He’s clearly simply trimming from the bottom, and doesn’t understand that “shorten the toe” here means horizontally, NOT vertically. He’s done a terrible job all around for at least a full growth cycle, so 9+ months.
Do you have recent xrays? Apologies if that’s mentioned above. There are some good trimming groups on FB, and while you can post for free in this one, she does offer paid consults to help show you exactly what to do. I’ve watched several members really learn what’s what
Normally I point people to the ELPO tirmming mapping to learn to trim, and I will here too, but IMHO this needs more eyes-on because of the whole NPA thing
https://www.lamenessprevention.org/site_page.cfm?pk_association_webpage_menu=6600&pk_association_webpage=13307
ALL that course material is free. And you can map feet over and over and over before ever trimming anything