It looks like a nice a tidy trim, but you are battling one of the hardest pathologies to remediate....flare forward. The trim needs to be more proactive, though. The old growth at the ground at the toe is still so far out there that its pulling on the tighter new growth coming down the hoof, so the new growth isn't tight either. By the length of the pulled new growth, I'd say you haven't made any headway for six months on this, sorry.
The toe way out there is also pulling on the heels, which are getting run under. They are good length. If you let these heels grow, the toe will continue to pull them under and then you won't have any heel to work with anymore, so that's not the right answer.
Your heels are a nice length right now. Nice for a confident heel first landing. So you just tweak the heels and keep them confident while you bring back the toe and get the pull off of everything. When the pull is off, the heels will start to straighten up.
In the meantime, you maintain their length, but correct the angle on them. Its all about shape in your trim and angles. So, even though the heels are pulled forward, you make them face the ground anyway. FORM IS FUNCTION. Again, you rasp the bevel differently than you are, to disengage the toe pull immediately and get the torque off the knees.
This foot is like you putting a clown's shoe on and walking. The toe gets in the way of the heel first landing and it lands first, reversing all the mechanism in the hoof that crunches everything backwards, instead of flowing forwards....like brick walls of stoppage in her steps. (navicular, sidebone, arthritis)
Once you apply the bevel correctly, you'll see a difference in her movement as soon as you leave the trimming area. She'll stop lifting her knees higher to get that toe to clear the ground and will adopt a more sweeping motion with a heel first landing. Horses are stoic. If they show weakness, they are predator food. She cares alright. If you had a long finger nail and put your finger on the floor and bent it backwards and put all your weight on it...that's what it feels like to her.
Every time she breaks over to take that foot off the ground, the toe wedge bends backwards, pulls some more, stretches the white line and P3's nose comes down lower in the hoof. Flare hurts. I took a 3" toe wedge off a horse once, set her foot down and her sinuses started draining like crazy. It took a whole kleenex box to control the flood of mucus and she didn't sneeze, but got scared with the suddeness in it. Her eyes lost the puffiness that she had before we started, right in front of us. You better believe she cares.
There's a heart in each hoof and its health affects every system in her body. Make no mistake. The left foot is actually the worst foot and its also longer than the other, so you can take the path of pathology and extend it past her knees and go right on up to uneven withers and the need for a chiropractor. So, something needs to be done about this hoof to help it, possibly avoiding the chiro. If you can post more pics, I can draw lines on them to show you what you need to do.
The goal is to get the hoof capsule tight to the bone, so that they work as one together. You're doing a good job. Just need to tweak the angles and get the function so that she can get move properly and get her own ducks in order. If you care to post pics, I will show you and explain. Takes me hours and won't cost you a cent. Just wish to help and have been doing this for years. You'll be able to draw those lines right on the hoof (until you can see them without the lines) and arrive.
I'm only as good as your pics, though. Its gotta make sense to you, or you can leave me behind. No problem, just trying to help.
a) Front shot: 4'out in front of the horse, camera on the ground, both feet standing square and catch up to the knees. Don't angle the camera upwards, keep it flat on the ground.
b) Heel Shot: Lift the hoof, hold only by cupping the front of the pastern and let hoof hang. Lean forward, but a good 2' distance and catch part of the cannon, the heels, the apex of the frog and the toe in the background, so not too severe an angle. I need to see the whole bottom of the hoof. This one is important. This one allows me to show you exactly what you are seeing when you pick up the hoof. Let's do 4 of these, one for each hoof and get her all squared away.
c) Side shot: One of each hoof, from the outside, 4' away and camera on the ground again, centered between heel and toe.
d)Solar/side shot: Lift hoof and re-position yourself so you are facing in towards her leg. Get parallel to the bottom of the hoof, then lift up a bit higher to be able to see the bottom of the hoof and the depth of the groove.
e) Solar Shot: Pick up hoof and get directly above (2'away) the bottom of the hoof and centered a 1/2" behind the apex of the frog.
So, you need clean hooves on concrete, one front shot, 4 side shots, 4 heel shots, 4 solar shots and 4 solar/side shots and one body shot, like a conformation shot, but let her settle and stand the way she wants to. Post them and I'll draw some lines for you. At the very least, you will get to know her feets better and how each one is different. I'll keep my eyes peeled for your return with pics......