Animals need water in order for their bodies and brains to function properly because without water they will become dehydrated, malnourished and will ultimately not survive. Most animals actually gain the majority of their water from the food they eat, rather than consuming water by itself.
Proper water consumption ensures that an animal will maintain its body weight, body temperature and overall health. Unlike humans, animals do not have large quantities of stored water in their bodies, which means that they have to regulate their water intake carefully. While the camel can store and lose up to 40 gallons of water, not every animal is so lucky.