Rachel's gelding that she shows is 28 and was diagnosed with navicular syndrome 11 years ago. He also has sidebone in his rt front foot. That little piece of calcified cartilage is broken off and floating around. With some mild corrective shoeing, he has been very sound. 3 weeks ago, he got new shoes. He was overdue by about 3 weeks because of the farrier's illness. I think he had pneumonia. Anyway, he was s hod on Sunday, just a tiny bit gimpy on Monday and Tuesday. I gave him bute on Tuesday and Wed. He was great Wed-Saturday. We even went to a fun show on that Saturday with him. He was very, very sore ever since. At first, I thought, well he's just old and navicular so I gave him bute and used surpass. He improved, but was not completely sound...still a little tender. This past Monday, it had been 8 days and I thought he was alot better. I told Rachel she couldn't ride, but she needed to get him out and practice SMS. He was very lame at a trot. I called the vet and they came on Thursday morning. They wanted to wait and let all the bute/surpass I had given him get completely out of his system. Xrays showed navicular bones looked "pretty good", but he has arthritis around all the little bones in his feet. Vet recommended some changes in his shoeing. The farrier is coming this weekend to reset him. We also started him on isoxsuprine. Has anyone had experience using isoxsuprine? How long did it take before it was effective? We're giving it 2 weeks and if he's not comfortable at that point, we're going to inject his coffin joints with a steroid injection. If for some reason that fails, she said we can try chemical nerving. She recommends that over actual surgical nerving because you don't have the risks/complications and it's not as invasive. Also, it's easier to repeat if needed. Anyone have any experience with this? I think the drug they use is called Serapin, but I'm not sure. Input anyone??