We begin litter box training between 3-4 weeks of age. This helps play on natural instincts to keep their play and sleep area clean. By 5-8 weeks of age puppies are well trained and rarely have accidents. All of our puppies undergo a series of health tests to screen for various possible hereditary diseases, including HCM (heart) by a specialized cardiologist. These measures avoid many problems for our pups. Visit our website for more details