Odd statements in your opinion. Only 2 seconds of open minded thinking would draw the same conclusion that animals do in fact drink from multiple sources, not to mention the fact it is brought up on documentaries all the time. You seem to think that I am preaching that it is unsafe to drink tap water. Are you usually this cynical? I am merely saying it is good practice to drink water from multiple sources, that way you get a balanced diet instead of subjecting yourself to exactly the same stuff day in day out. There is no way of prooving what is good and bad for you in the long run as there are too many variables in life, so keeping things mixed up would make sense.
So I take from that you can't support your claim with any evidence.
I did have a quick look as well, but couldn't find any evidence to back up your statement that animals purposely drink from multiple sources either...
You can do as much "open minded thinking" as you want, but you need to back a statement of fact based on your "open minded thinking" up with actual empirical evidence.
And yes I am generally pretty cynical when it comes to unsubstantiated claims on the Internet. It's only a tab away to find the reality.
Edit: and no, I'm not trolling. I just dislike unsubstantiated "facts" being claimed. It only takes someone else to read it as true and it can end up spreading. There are already enough wrong "facts" on the Internet as it is. That's why I asked you to substantiate it.