Hey, it's not called Pet Dental Food Additive! In all seriousness, this pet oral hygiene solution does need to be added to water to maintain its effectiveness. If your cats are not big water drinkers, try spreading a little Pet Dental Gel Toothpaste on top of their paw instead. Since cats like to groom themselves, they'll naturally lick the toothpaste off their paw and clean their teeth at the same time! And be sure to talk with your vet about your cats' water intake if you have concerns.