A dog constantly need to replace the water he loses through panting and eliminating. Panting is the way he regulates his body temperature during all types of weather. An average dog requires approximately 1 ounce of water per pound of body weight per day. This means that a 60 pound dog will need approximately 60 ounces, or two quarts of water per day. When the weather is warm, or in times of stress, he may need more. When traveling, you may want to bring along water from home to help avoid stomach upset.