That's great to know! So far, they look great! No signs of any deficiency (phew)! I've had yeast on my grocery list for a month now -- who knew that would be such a hot commodity right now? As soon as I get some I'll add more in. It sounds like there is no such thing as too much?
Also, yes! I...
Oh that's great to know! Right now they're on a duck specific formula, which I assume contains sufficient niacin for their age (6 weeks). When I mix them with my chickens and put them on an all-flock feed I will be sure to top it up with some nutritional yeast a few times a week!