i usualy put two table spoons to 8 pints so one large spoonfull to the adverage drinker rember if using vitamins let cool down or will kill the vitamins hence why i prefer the brewers yeast on the corn and contains everything they need and esential amino acids as well probably the cheepest way to give vits to birds
i still use the mollases suppose to be good for keeping worms at bay dont know if its right but read many years ago that it was used in the past for worms and funnly enough in tests no worms present :-/
well after i have been using Aviform Ultimate and Origo-stim and i think both not that good i have swapped to this at least its proven and alot cheaper and as for vitamins im just using brewers yeast has everything your birds need i did like the old Aviform on the molasses base much better
oops my mistake i thought the natural was a 100ml need to go and get my eyes tested , if its good enough for horses is good enough for birds
http://en.wikipedia.org/wiki/Echinacea#Medicinal_effects
i tried that once thought it was a waste of money , i think wormword is willow bark , i used to get it at boddys but i think it was made by columbine but no longer made :-/