Thank you everyone for the responses! They have been extremely helpful and really clarified a lot of what I have been reading over the last week!
I have read through the lameness prevention website once now and will go back and reread it again. Some of it definitely went over my head the first time but it is making more sense the more I read it and other articles. I'm glad I'm coming up on some holiday time as I now have quite a bit of learning to do and I look forward to it.
A little more background on the 6-8 week trim schedule. I work for a nonprofit so I am constantly battling cost and correctness. Sadly it is more cost effective on the business part to keep the horses at 8 weeks unless there is a "need" to trim at 4 or 6 weeks. "Need" being lameness or corrective farrier work. IE a standard bred with extremely overgrown feet and underslung heels is on a 4 week schedule currently but he will eventually go to a 6 week, then an 8 week if my supervisor thinks he can get away with it. I do know how the 8 weeks can hurt a horse, but those who manage see it as just going a "little long." In an ideal world, our horses would be on the 4-6 week but I work with what I have. Getting swapped over to a proper diet and testing our hay has been enough of a battle. I'm working little by little toward the best care possible.
Thank you for taking the time to post photos and break down individual parts of one of the photos I posted. I'm a visual learner and that helps me greatly! To clarify some, with the weight baring area moved outward creating the stress and flare, could this also make a horse more prone to develop white line? There is a disturbing number of horses that have white line in the quarter section of the hoof. To couple with this, there are many that also have holes in specifically their right front hoof. Would it plausible that this is due to the lost sole depth or would it be more from the concussive force of stumbling that
described. Or maybe a combination of both? The horse in that particular photo does have an extremely short stride and is know to drag his feet, stumble, and have extremely sore shoulders and withers. According to the farrier, there is no reason for the horse in that reference photo to go lame after a trim.
I was able to grab some before and after photos of the horses trimmed on Thursday. With that said, I did what I could while taking photos and tried to mimic the reference photos that I had seen in many different forum posts on here and in articles. After looking at loosie's links, I know I can do better. Though I have do feel like I have learned a lot just from looking at the photos without having to think about what is going on around me. There are several things that have raised more questions in looking through these photos. One is that I believe the farrier is taking off the bar of the hoof. There seems to be no "ridge" in that area. It is just as smooth and flat as the rest of the sole. Two is that many of our horses do not have a smooth sole. Instead it is bumpy and "cavernous" like a canyon. I'm not quite sure the best way to describe it, but hopefully the attached reference photos will help. Three is that many of our horses don't seem to be well balanced in general. Lower on one side of the hoof than another, the medial side of the toe having more "point", and the widest part of the hoof being to far forward to what mapping would suggest is ideal. If anyone could either confirm or correct me would be greatly appreciated. I feel like I'm trying to absorb an entire farrier course over just a few days.
The posted photos are front view, left foot, right foot. The top photos are before, the bottom are after. I decided to also include photos from the side as it seems like a lot of foot was taken off all the way around on this particular horse. But maybe that is just part of him going 8 weeks and having a need to be taken down that far. I don't feel I have enough knowledge or experience to really make an informed decision on that yet though. As another note, in the before photos I hosed off the feet. In the after, I took them as the farrier finished with the horse but did not hose or give a deep clean like I had before (other than to pick some left over dirt from the collateral groove). I do have photos of six different horses, but I'm not sure if that would be overkill posting or if there is an efficient way to post all of them.