I’m only worried because they are a very clingy duo named chicken and goose. They go everywhere attached at the hip. Chicken the female has awful diarrhea but Goose the male is fine just a little wobbly. I will go get the liquid b and as far as the nutritional yeast goes the person I contact here at our local tractor supply said to hold off on that and mealworms, I have obviously recently question that judgment because this is the second time they said something that I felt was just wrong. They wanted me to use wood chips as bedding and I bought that would be a super hazard for the curious babes. They don’t really get anything I don’t give them unless it’s some grass or their ever favorite spiders. We have generic friendly house spiders all around which was another reason to get the ducks, to help exterminate the ever growing populous. Thank you for all your advice. I am going to start it out and update when things either improve or if for some odd reason they don’t.  Anyways I am definitely going to start coming here for more information instead of a store where they clearly know nothing about ducks specifically.