I'm pretty new to bird hunting and just picked up a 12 week old brother and sister GSP. My 9 year old GSP was just a spoiled pet that got introduced to birds 2 years ago and has been mostly just a good companion with no training while hunting. She finds downed birds and gets birdie now and then but it's new to her too. I intended to help these pups be the good bird dogs I know they can be so I'm looking for advise. When should training begin? Whose books or videos are best? E collar/no E collar? Work with them together or individually? And should I try to work with the older dog as well?

Veteran advise appreciated,
Joel