Hi, just come across this thread.
I just wanted to share my experience with Andonas. We got our boy from there, he is a great dog, beautiful temperment. Our dog is great with kids, and loves to play around with all his toys. Compared to some other Andonas Kennels dogs he is not quiete as big, but he is in proportion.
From about a year old our boy started having seizures once a month. We have put him on medication and have had to up the dosage once and he is now also on another medication and valium when he has any seizures.
This has been diagnosed as Epilepsy "unexplained seizures". We mostly have it under control at the moment, and we can see the signs leading up to when he may have one (actually he usually has three before the valium kicks in).
We never asked about the health testing, we really should have. You do live and learn and we have from this experience.