Just the other day, I finally caught one of our Roen ducks having a seizure. We had always known she was a little bit different: she sometimes would withdraw and would not stay with the rest of the flock, didn't care to eat when others got treats, and so forth.
She's just a little bit over 8 weeks old, but she handled the seizure like any other animal would. Once the episode was over, you could see the clarity come back to her, and off she went for a swim. Granted, she wasn't too thrilled about the fact I was right next to her, petting her belly until she was finished
Their diet is just fine, and there are no other obvious outside influences that could explain her episodes. The fact the others, nor the chickens, are having them tells me it's just the way she is.
We love her all the same, and are glad to have her in the family. I think it's important for people to understand that epilepsy is not a death sentence. While scary for the "mom" or "dad", it will generally all be ok.