Hiya! I have been trying to find an answer to this for 2 days and now I have to go get some other things done, so I was hoping someone could help me. We have a bottle of NutriVet Brewers Yeast (flavored with garlic / for dogs) that we got for our poch at Tractor Supply. I would like to be able to share these with the ducks and chickens, but can't seem to find proper dosing / frequency. At this point both the ducks and the chickens free range during the day are have free access to layer crumble/cracked corn mixture. It is cold here so we've upped the corn %. They also get plenty of goodies and treats and ACV twice a week. There does not seem to be any health issues at this time. So, what do you think?