Nutrition is a complex subject, so if there is a way to master sixty percent of the stuff your dog’s body requires to be healthy it would be great advantage. Ninety percent of a cell is composed of water while sixty percent of a dog’s body is water. Therefore it is vital your dog has unlimited access to water, a dogs ability to get a drink anytime they fill the urge is important, you do not want your dog obtaining habits that limit his drinking because of their restricted access to water. Water functions as a solvent (a substance that other substances dissolve in), as a lubricant, as a conduction system for transportation of vital nutrients and unnecessary waste, and as a mode of temperature regulation.