Wow, I would have loved all the options and treatments your horse received. My mare has laminitis and no one in the area could really treat her. After researching, the number one thing I did was diet and proper barefoot trimming. We gave her a year off- put her on smartpaks metabolic supplement and farriers formula, along with purina well solve(expensive- but she only gets >0.5 lbs twice daily with supplements), and little pasture or hay. It took well over a year, I cheated and started riding a little 8 months in. We just walked and I put her in easyboots if needed. I have kept her up on this and she stays sound 98% of the time. Good luck with your horse. So hard to see them go through this disease.