In addition to all of the sensory stimuli, sights and sounds are a big part of a dog’s life. As soon as ears start to open, the sound effect CD's start to play at a low volume and over the weeks it increases to the actual sound level of the object making the noise. The puppies are exposed to sounds of thunder, fireworks of all kinds, heavy machinery, small children playing, infants crying, kitchen noises, gun fire or all calibers, etc. This helps to prevent sound sensitivities when the puppies get out in the real world. Everyone has had or seen dogs who go crazy over thunder or bark the entire July 4th weekend. This sound exposure reduces if not eliminates this behavior completely.