You can get the vitamins at TSC and the brewers yeast at a health food store. TSC may have yeast because it is a common poultry supplement, but I wouldn’t count on it.I just woke up and the duckling is the same as yesterday. extremely weak, mouth opening and closing, and one eye just stays shut. i now have questions, as i now believe it’s definitely neurological, where do i get the vitamins and brewers yeast? and what vitamins do i give him? how would I give it to him? Thank you for your help.