SuperWanda, this is one of the two conditions that afflicted a sheltie I bred and sold 7 years ago or more. Combined with immune- mediated hemolytic anaemia it's called Evan's syndrome, which is what Arie had. Very sick dog with a wonderful owner, it has cost him over $7,000 but they have finally nearly weaned her off all drugs. I'm sure if you Google it you'll find there are a lot of possible causes.
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