I have two cats, and one of there favorite things to do is wait for me to get out of the shower so they can sit in the wet bathtub. They wait for every last drop to fall and lick up the remaining water. My youngest has even jumped in the shower a few times while on. They have a filtered water bowl/fountain which they use as well. I wouldn't worry too much about them not using their water bowl, but do make sure you wash it often to avoid the water from becoming stagnant.