Cats are efficient at maintaining hydration. However, those cats with certain health conditions may benefit from greater total water intake. Dr. Sparkes provides a brief overview of feline hydration and the conditions in which water intake may be critical for health.

Studies have indicated that water supplements can be highly palatable to cats. These studies demonstrated that cats not only drink more liquid, but maintained higher liquid intake when given access to nutrient-enriched water. Consequently, urine volume increased and urine specific gravity decreased. Cats that need greater hydration would benefit from a water supplement.