This is primarily what seemed to set my boy off when he had his seizures. It was always at night(they were in a brooder in the garage) when I went to check on them before bed. I'd turn on the light and then talk a lot to them as I walked to the brooder. They were awake and watching, but as soon...
It could be a deficiency, but it's hard to say. I supplemented with brewers yeast for all of my duckings and my male Cayuga still had two random seizures that to this day still make no sense. I had read somewhere that it was somewhat common in Cayuga ducklings around that age, but I'm hesitant...