This is what I have, except for the SM part (I only have the Chiari crowding, no SM). It says that upon diagnosis dogs will be euthanized?! Holy crap! No one has euthanized ME yet :) and also it was interesting to note that the disorder gets worse with each successive generation of dogs. This is something some of us EDSers/Chiarians have noticed among ourselves. I can identify with these poor little dogs.