To teach a dog basic commands, such as sit, stay, come, and heel, you can use positive reinforcement training methods. Start by using treats or toys as rewards for when the dog performs the desired behavior correctly. Be patient and consistent in your training sessions, and always use a clear and firm voice when giving commands. Break down the training into small steps, and gradually increase the difficulty as the dog progresses. Remember to also praise and reward your dog whenever they successfully follow a command.
