The fact that Oliver has been able to live such a happy and full life in no way excuses us from doing our best to eradicate SM from the breed. But in the meantime researchers are discovering more about the disease, new medications are being tried, more breeders are doing their best to breed healthy stock - SM can be excruciatingly painful for some dogs, but doesn't inevitably lead to 'a poor life'.
Strongly agree with that!

i seem to remember him scratching the air by his ears
If Oliver was doing this, then the odds are overwhelming -- I think without doubt, he had CMSM. Neurologists say air scratching is exclusively associated with CM/SM.