I'm so sorry I fell off of the face of the earth after my original first postings. I've been very busy.
First of all I'd like to thank you all again for the amazing input and advice you gave me...I truly appreciate all of the feedback you gave me!
Hannah is doing WONDERFULLY, and flourishing after 3 weeks at my farm. Today is 3 weeks since she got off of the trailer.
A few days after the pictures I took, the craters in her hoof walls became noticeably deeper, at which point the farrier was out to look at her and began peeling acrylic off of her hooves. The place she came from had filled her hooves in with acrylic to try and hide the horrific state they were in. The craters, however, are growing out and new healthy hoof is growing in.
As for my farrier's advice, this is the first time I've ever posted on this forum and as I know how the internet can be, I ask that my decisions to follow his recommendations are respected. As it is my horse is doing wonderful under his care and so far his advice is working well.
He saw her early in the week after I got her and was horrified by the state of her hooves. He said what I already knew, that is was poor nutrition accompanied by living in wet grass 24/7. Basically the equivalent of us sitting in a pool for days on end and our skin softening.
He identified some scars on the hooves that he feels were abscesses that were untreated and left to blow through the hoof wall. At the time he saw her, he was very unhappy they had shod her with her feet in that condition, but as she is sound and comfortable and we live on land that is very rocky in some spots, he was uncomfortable removing her shoes at that point as he doesn't want to take away the something that is obviously helping her remain sound. We're allowing her to grow a little bit of healthy hoof in our VERY dry environment (gotta love NJ in the summer, for some reason it turns into a desert in my area) before he starts trimming them back.
I did get her on a high dose biotin supplement as well as some topical treatments to prevent infection and promote healthy growth. On top of a much better feed plan. She's looking healthier all over.
All seem to be working so far. He is keeping a close eye on her feet (we have quite a few boarders at my farm and he's there pretty frequently), and is going to let me know when he feels it's time to pull those shoes off and start getting them back to an appropriate shape and length.
He's been working with OTTB's for years and is very confident he'll have her feet back to where they need to be within the year as long as we keep close tabs and a strict treatment going. Winter will be tough since that's when it gets wet and gross around here, but I'll be OCD about it and she'll get there. :)
Again, thank you all for your advice. I trust my farrier as I have been told stories of him dealing with scary hooves in the past and he's been working in this area for years and years and is well known and well loved.
Aside from that, 3 weeks later I'm madly in love with this horse! :)