This could be due to a brain lesion. It happened to my DIL's pup and she was put on prednisone. She was around the same age and they didn't do diagnostics...just tried the pred and it worked which pretty much told them that was the cause. Amazingly her vision returned almost immediately.
Best wishes....
Last edited by ladyjane; 04-23-2016 at 09:08 AM.
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