Research overview: comparative water requirements of cats and dogs

Cats and dogs differ in how they handle water, and this overview reviews the comparison and its roots in feline biology. Cats, descended from desert-adapted ancestors, tend to have a lower thirst drive and to obtain more water from food, sometimes drinking too little when fed dry diets, whereas dogs more readily drink to meet their needs. This reflects the cat evolutionary history in arid environments. Researchers study the difference through hydration and feeding studies. Why it matters: the cat muted thirst response has practical consequences, contributing to chronic mild dehydration and urinary problems in domestic cats on dry food. Understanding it connects the desert ancestry of cats to modern companion-animal health, showing how an adaptation that served wild cats in dry country can become a liability in the home.