you need to start training them now. Put one away in a kennel or tie it up, two pups will egg each other on. Put in some one on one time with each of them. Being a working breed they need a job, you need to give them a job, supervised. Not a good idea to sit back & wait for them to be trained by the older dogs, it just isn't going to happen that way. Maybe think about rehoming one of them to make it easier & give you more time to concentrate on getting one trained.