Answer: Right away! Anytime after you bring him home (7 weeks +) is fine as long as you keep the sessions short and fun. Puppies learn things every time you interact with them, every day they are in your home -- they might as well be learning good things. Have a good time, enjoy seeing the world through their fresh eyes and celebrate learning new things together. Training is such fun when you do it with your puppy rather than to your puppy