According to a new study it appears that most tap waters are fine for dogs. Possible increases of bladder cancer in people who drink tap water do not seem to affect dogs.

http://www.medicalnewstoday.com/articles/109720.php

Michael Jacobson, who is the executive director of the Center for Science in the Public Interest in Washington, D.C says that it is crystal clear that chemical dyes in foods affect the behavior on children and is asking that manufacturers stop adding them to our food supply.

http://abcnews.go.com/Health/story?id=4988343&page=1