This is one of the easier questions to answer. Start training ASAP. Seven to 16 weeks of age is the best time to begin training, but if you can start earlier while the pup is still with its mother and liter mates that’s even better. If your dog is an adult and you have unwanted behavioral issues, start training ASAP since the behavior is self-reinforcing and will continue to become stronger each day that you wait to start training.
