Kidney / Liver Support

I've noticed that overnight the rings under my dogs eyes have become very light and pronounced. I know that this means the kidney and/or liver may be overtaxed. For those who have not been following my plight - Lucky has cancer and is being treated with alternative medicine.

Additionally Lucky used to drink very little (about 10 - 12 oz per day) and has increased her intake by at least double if not triple. She weighs about 45 lbs. My question is whether I need to worry about this or whether this could be due to change in medication and the high temperatures we've had?

Thank you for your help!