How often a dog should be bathed is determined by the texture and quality of the dog's coat, the kinds of activities the dog participates in, the dog's overall lifestyle and any special bathing requirements a specific breed has. Bathing a dog too often removes the coat's natural shine.
To bathe a dog properly, use a rubber mat in the tub so the dog doesn't slip, and place cotton balls inside the ears to prevent water from entering the ear canal during the bath. Fill the tub with lukewarm water before putting the dog in the tub. Wipe off the dog's face with a damp cloth, then wipe the area underneath the ear flaps. Spray down the whole dog, making sure that the water reaches through the coat to the skin. Use a shampoo that is specifically designed for dogs, and work it through one section at a time. Make sure to scrub the neck, chest, belly, legs, feet and tail in addition to the back and sides of the dog, and rinse very thoroughly to prevent skin irritation.