My health (hair and teeth!) took a beating when I drank "flavoured water" daily (minimum 2 bottles) for maybe a little over a year. It took losing LOTS of hair to wake me up from the huge mistake. I blame the enabler.

Back then, my mom would stock on cases upon cases of it like normal people do for bottles of spring water. So she was the supplier of "free" thirst quenchers. My boyfriend was smarter. He hardly touched the stuff so he has naturally thinned hair instead. LOL
Anyway, be careful of diabetes in people and dogs. Keeping it plain and simple is always the best way to go.