To express a dog’s anal glands, gently lift the dog’s tail to expose the anal area. Wear gloves and apply gentle pressure on each side of the anus using your thumb and forefinger. Squeeze the glands in a milking motion until the foul-smelling fluid is expelled. Be cautious not to apply too much pressure to avoid discomfort or injury to the dog. After expressing, clean the area thoroughly with mild soap and water, and dispose of any used materials properly.