I believe that a dog should be around 1 year old before it see a e collar. It must know what it did wrong if you use an e collar. A check cord is your best training aid for a pup. If the pup is starting to point you can "work" in on the cord while whoaing him. You can guide him back to you while calling him back.
To many people want to rush it and go right to the Ecollar. Start slow and do it right, use a check cord. Ive found 25ft is plenty long enough. Any longer gets tangled to easily.