[GG]

Most trainers start the FF when their dog reaches the six month old mark. However, that age is only a gauge used by most trainers including myself and not a definite time line. Before you move into formal training with a pup he should be mentally and physically prepared to handle the rigors of force training. It takes experience and know-how to make that determination. if you're wrong you can destroy a sensitive pup or take an unnecessary piece of his attitude that can never be replaced.
good luck
GG