It is very expensive and for instance available only at one University clinic. Both examinations are painless and smooth. The dog is awake the whole time. ERG only once. The ordinary test must be renewed every year.
Many people panic and start to plan for putting the dog to sleep.
There is no reason at all for this. With very few exceptions, blind dogs will move around in their house, garden and at familiar places as if they had full sight. They compensate with other senses. PRA is irretrievable. Of course, you can have a hope that the diagnosis was wrong and if so, go to a second specialist to get confirmation.