Cats can survive on smaller quantities of water compared to other animals due to their developed urine concentrating mechanism. (Sorry if that was TMI, but we thought you should know)! Their low thirst drive allows them not to feel the need to drink as often.
However, lack of water in cats can result in dehydration. Cats can easily develop dehydration, which means they need to frequently hydrate to stay healthy. If your cat has decreased thirst or dehydration, there is a possibility your cat could be showing symptoms of urinary disease (bladder ailments or LUTD). Check with your veterinarian and keep your cat hydrated.