“Most cats fed commercial wet diets will still drink some water, but cats fed dry food will drink more as a result of the lower water content in the diet (Villaverde Haro, 2020). However, cats on a dry diet will drink less than the moisture consumed if on a wholly wet diet with a similar nutrient composition (Xu et al, 2014; Villaverde Haro, 2020).” Source: theveterinarynurse.com/…/moisture-matters-a-focus…
We have a water fountain going too and they hardly drink any water from there. But why leave it to chance?