Anyone else have experience with this, or is this information somewhere in a previous thread? I just never imagined I'd be dealing with this. Montana is a drop-dead gorgeous tobiano, sweet and full of potential. I'm 58 and thought he and I would "ride out" my horsey years together. Before him I had a QH mare for 15 years before she died. Wow! Sometimes life throws us a whammy! From what I understand, navicular is the kiss of death.