I've always added a splash with no ill effects; do note vinegar does not react well with metal - if you intend to offer this, it should be from an all plastic container only.
It's essentially an overfermented beverage in the same vein as kombucha. Vinegar in general will reduce some bacteria growth and I can say things don't tend to grow in my waterers when they are left out . For the chickens, small amounts can't be harmful and raw vinegars that haven't been pasteurized still contain much of the 'good stuff' - scoby residue - made of clumped bacteria and yeast(the boogery stuff...) and the resultant vitamins and organic acids from digesting sugars in the apple.
I've not noticed any issues with shell quality in my flock that could be attributed to ACV, but too much of anything can be a bad thing, so a splash or cap full for a large waterer is probably plenty and can just be offered as a treat or warm weather booster.
Brewing your own fermented beverages can be addictive too - if we had an apple tree, I'd definitely start my own culture from a store-bought one.
It's essentially an overfermented beverage in the same vein as kombucha. Vinegar in general will reduce some bacteria growth and I can say things don't tend to grow in my waterers when they are left out . For the chickens, small amounts can't be harmful and raw vinegars that haven't been pasteurized still contain much of the 'good stuff' - scoby residue - made of clumped bacteria and yeast(the boogery stuff...) and the resultant vitamins and organic acids from digesting sugars in the apple.
I've not noticed any issues with shell quality in my flock that could be attributed to ACV, but too much of anything can be a bad thing, so a splash or cap full for a large waterer is probably plenty and can just be offered as a treat or warm weather booster.
Brewing your own fermented beverages can be addictive too - if we had an apple tree, I'd definitely start my own culture from a store-bought one.