Quote:
Vinegar in a galvanized waterer leeches the zinc, which is poisonous to your birds. Best to use plastic.
ACV is good for the gutload flora and to fix sour crop.
In rabbits, does same thing, and anecdotal evidence suggests that it helps produce more females if given before conception. Even if it isn't true, the gut flora benefits coupled with the facts that it lessons urine smell makes it worthwhile to keep on hand.
hth,
tom