My two cats have a bowl of water which is changed free every day. They prefer to drink the stale water outside in the washing up bowl. It's probably the taste of fluoride, they don't like. I put the stones in the bowl as one side so if any small animal falls in they can escape.
A lot of birds are desperate for fresh water to drink, due to having no rain. I saw a seagull drinking from a cleaning bucket in Brighton station yesterday. I just hope there was no cleaning fluid in it.
I've put an old washing up bowl out, in my garden with some stones in it, so wildlife...