Personally I have a "do no harm" philosophy when it comes to my parrot. I would be worried about trying cider or vinegar without knowing what the bird's reaction to it might be. I know that giving exclusively water will not do harm to my bird. The possible benefit of putting new things in the water (except perhaps bird vitamins which have been tested on birds and used by other owners) does not outweigh my caution in case it's harmful.
For instance I've heard both sides in regards to using colored newspapers to line cage bottoms. Some say they are harmful and others say they are not. So guess what? I just use black ones and not colored ones cause everyone considers them safe.
there are so many articles on it. Its not a secret. At least not around here. I knew about its benefits to people and then came accross an article on it. So we started adding it in the drinking water. Very small amount at first. Also we have a well and the birds drink from that water. unless they are on handfeeding then they get water from the spring down the road. Ok were country people. But the apple cidet vinegar does a lot for them. But with everything check with your vet and make your own decision.
its been known to be good for people for just about ever. Then do a basic search on apple cider vinegar benefits. Then look for pets. You would find all sorts of info. But if your worried about it being toxic or harmful then it shouldnt be used in cleaning. IMHO. But here is a good starter info site for you.
I've been told to never add anything to their drinking water as bacteria can grow so quickly. This includes bird vitamins that are meant for the water. If you use them, I'd put them in the food instead though if you feed a well rounded diet you shouldn't need extra vitamins.
"I bet the sparrow looks at the parrot and thinks, yes, you can talk, but LISTEN TO YOURSELF!" ~ Jack Handy ~ Deep Thoughts
I believe it was in Parrots for Dummies, but the author mentioned that she places only one or two drops in her birds' water, and it slows the growth of bacteria.
“She was not quite what you would call refined, she was not quite what you'd call unrefined. She was the kind of person that keeps a parrot.”