I'll be anxious to see what the Forum Trimmers thoughts are.
In the meantime, can you afford another vet bill to have the vet come out and ultrasound the legs for strained or torn tendons?
It is entirely possible the hooves were cut too short in one strike and the result is stretched/strained or torn tendons.
I am at the tail end of that little piece of living H**l right now. My horse foundered 8-9 degrees on the LF, 5 degrees on the RF. The very well schooled and expensive rehab farrier cut too much heel at once and the result was torn tendons. The vet was beyond livid when he did the ultrasounds because he had given the nod of approval for this guy to work on my horse.
Ditto the styrofoam five minutes ago. You need to get pressure off the heels right away.
I put my horse in Boa boots and home made lily pads for 8 solid months. By solid I mean he was in the boots during day when he was outside and I took them off when he came in at night. The vet gave me a prescription for the thickness of the pads and how to cut them.
I had to cold hose and poultice that horse's legs twice a day for several months. I was finally able to stop poulticing the legs but, to this day, if the night temps fall below 50 and the day temps are 65 or less, he wears quilts and wraps to keep his legs warm.
Yes, it surely did hinder the founder re-hab time. We think he has completely de-rotated (Mr. WTW was in the hospital, so no $$$ for hoof x-rays for awhile:( but that has only happened in the last couple months, thanks to the tendon injuries.
Long story and I'm sorry but my point is have ultrasounds done, if you can possibly affor them and the vet has the equipment on his truck. I would not want to load the horse up and make him travel