He’s drinking like a fish

Cats, in general, don’t lap up copious amounts of water (about a cup for every ten pounds) so it should be fairly easy to spot when the water bowl empties quicker, or he’s trying to get water from other sources like the sink or toilet. ‘If your cat is drinking more water than normal this could be a sign that your cat has an endocrine disorder such as hyperthyroid disease or diabetes,’ says Dr. Rossman. Definitely give your vet a call if you notice your cat is lapping up more water than usual.