thank you for the detailed post. Vets calling it laminitis not founder. Rotation is 1 degree left front 2 degrees right front.
I'm going on what I've been told I've done some studying on hooves but not a ton.
Many use laminitis and founder interchangeably, both lay and vets. Some articles are posted that state outright the term are interchangeable.
Others publications state that founder does not occur until displacement of the coffin bones occur.
I just looked at laminitis in the Merck Manual and they have (founder) placed under the title but go on to refer to displacement as advanced laminitis.
So it would appear the terminology is up for grabs. I regard the Merck Manual as the final word.
About the cause of the rotation being lyme or feed related.
Fact is, the management in the future is not much different. Once the laminae has torn loose and the damage to the vascular system has occurred, they will never fully recover leaving the horse susceptible to grass induced laminitis whether the laminitis was first caused by lyme or not.
Pete Ramey has a trimming protocol for reversing distal decent and rotation which has been very successful even with cases where the coffin bone actually penetrated the sole. His method was tested independently by a university research team with great success. I am following his protocol myself.
His protocol does require boots 24/7 for sole protection. In severe cases casting was used.
I am using Scootboots which has been a life saver for Hondo, perhaps literally.
As the lamellar wedge formed from the rotation is growing down it has caused an elongation of his hoof that cannot be entirely corrected until the rotation is corrected. That require a longer boot size as the straps on the back became tight enough to cause sores. With the larger boot, the sores have healed while wearing the boots.
When the vascular system is damaged, the nutrients required for sole growth is diminished resulting in thin soles. If Hondo does not fully correct, he may need boots 24/7 for the rest of his life but for certain while being ridden.
There are two before and after x-ray photos on Ramey's site with the first being severe sinkage and rotation and the second being close to a full recovery and strong sole depth.
The two x-rays were taken 2 1/2 years apart and care was ongoing. There's no quick over night fixes to laminitis or founder.
As an aside, I'll mention that the breakover on both the toe and quarters of the Scootboots have been relieved with a belt sander and extra pads attached to the outside bottom have been attached that moves both breakovers further back and inward. Similar tho the Steward Clog concept. With out those, Hondo is much less comfortable.
And BTW, when I'm trying different things I measure Hondo's comfort by two methods. He will normally come along at my side with a loose lead. Under discomfort he will resist.
I also sit and time the foot shifts of his fores, either by counting or a stop watch. At 15 second shifts he will be very resistant to lead. At 30 seconds he gets a lot easier. By 60 seconds he leads normal and his feet can be held up much longer.
How long all the weight can be put on one fore while the other is being held is a great test for soreness and also for identifying which is the most sore.