I don't know much have been told that Australian Shepherds are prone to epilepsy. My neighbor had 2 Aussies and called me at 2 am saying, "I think Sissy's dying" and we got her rushed to the emergency vet and she had been having a seisure. That vet as well as several others (in Houston) said that Aussies are prone to epilepsy. As luck would have it, my neighbor was epileptic too, and she and Sissy had the same medication!