“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: https://www.theveterinarynurse.com/review/article/moisture-matters-a-focus-on-feline-hydration

We have a water fountain going too and they hardly drink any water from there. But why leave it to chance?