My 4 yr old chichuaua always drank water from her bowl. Now the last 3 days she turns away whenever I try to give her clean, cool, fresh water. She eats, goes outside to do her business, doesn't whine or in any pine. I am at my wit's end. Do I need to take her to a vet?

Are you sure she has had 0 water? Dehydration comes to mind. Is she still peeing the same amount as before?

If not then I would say take to vet to get checked over.

Depending where you get your water from it is possible that the reserve has just been chemically treated and smells different to the dog.
Try some bottled water to see if that makes any difference.

If dehydration is an issue then get some pedialyte and give her some with a syringe, just a small amount every 15 minutes to half an hour until you can see a vet.

Try dipping your finger in the water and putting it up to her noes