Water serves as a critical component of all an animal’s tissues, from blood and organs to muscles. In fact, your pet is principally made up of water! Even a slight insufficiency in water content can, therefore, have devastating effects on an animal’s health. One of water’s many functions is to help the body maintain a safe core temperature range. As your pet gets hotter, he will try to cool himself by panting, which causes some of his body’s water supply to escape. Hot temperatures may also cause the water in his bowl to evaporate, leaving him critically short of this life-giving substance and helping to set the stage for heatstroke.