Any additives in water, you should also offer plain water in another container.
Ditto Dat!!!^^^
Constant long term, or even occasional, ACV doesn't do much for the birds and could even be detrimental. More for humans keepers to feel like they are 'doing something'.
Electrolytes also should not be given constantly.
I give mine a dose once a week during temperature extremes.
It really helps for cold stress as well as heat stress.
Hot weather
I give a dose of
Sav-a-Chick electrolytes/vitamins about once a week during heat waves.
It
really seems to help....started this after they saved a heat stroked hen once.
Can mix up a smaller amount, just wrap the packet tight and store in a dry cool place.
Always have plain water available too.
Cold weather
I've started soaking rolled oats in a Sav-A-Chick electrolyte/vitamin solution.
This avoids the 'wattle dippage' of an open waterer.
Gives them a boost and gets them hydrated.
1/8 teaspoon to 1 cup of warm water, mix until dissolved.
Add solution to 1 cup of rolled oats, stir well on occasion until all liquid is absorbed, might need to add more oats. Takes an hour or two, then give it to the birds.
Have done this every other day during this last polar vortex, and I believe it's really helped them, they all stayed mobile. Gives me a good chance to assess mobility, any bird that doesn't go for the oats gets watched very carefully and may be brought to a warmer place for a couple hours to 'reset'.