I don't know about the apple cider vinegar, if it MUST be the organic "with the mother" stuff, or if the grocery store variety would be good enough -- I found the organic stuff easily on Maui, and the chicks loved the taste -- I have been using the regular stuff here and these like it too
also I think if you add the grocery store variety TO the organic-mother, that it picks up the whatever-it-is that is supposed to be super good
I do know it is a mild antiseptic, good for cleaning things --- also if you add it to their water, it seems to slow or stop the growth of algae and other ickinesses --- it's also useful to rinse through your hair to get the last bit of soap scum out
good for people to drink too, slightly acidifies the urinary tract ... and it actually tastes interesting to me, if diluted sufficiently (a splash in a big glass of water)
I sprayed the "landing platform" in the pen, with ACV, and it seems to have removed the odor of the bleach I used earlier
(also good to get the poo-smell off hands after raking and scooping the coop)