I've seen the 'Now' stuff recommended before on another website but I wanted to find out if that's the best option or not.
Around the time I was using yeast I read that some brands don't contain the right kind/amount of B vitamins, but from what research I could do I don't think that's an issue with 'Now'. I wasn't crazy about the price, or the mess, but I felt comfortable it was helping my ducks hit their niacin requirements when I couldn't find their usual duck pellets for a week or two.