It is your Sage who is dominant. Dominant dog doesn't fight and often displays submissiveness, those who have power over others don't have to fight, but they are very determined to get what they want, they are demanding. Look what she really likes to be the first at and what she subsequently dictates, it could be food she's jealous to receive from your hands, or place to sleep, or other preferences, and not necessarily all of them at once. If Ryker behaves as pushy and abusive - he is just a status seeking individual, and not necessarily he will get it. If I were you, I'd leave your dogs alone to sort it out between themselves, and focus on your relationship with a young male. It could be tricky taking him out for a walk and training him separately from your other dog, so not to cause jealosy and imparting frustration on her. By playing with your dog and training him at the same time you yourself determine his status as an inferiour, because only the leader could be a teacher whom the other dog just copies. You can start with training him fetching, dropping at your feet and giving into your palm a ball by command. Do it in the open area in the park off leash. This simple game doesn't only help your puppy physical development, but it helps establishing proper relationship with your dog. Many trainers use a ball as a major tool in training. The ball represents a prey object for the dog (flying ball is a bird, bouncing ball is hopping mouse). The leader of the pack is fed by others, he gets first to the food, by bringing this rubber "prey" back to you your dog unconsciously agrees with your leadership. When your puppy starts playing and giving well, take your older dog on the playing ground. There are quite a few techniques how to play ball with two dogs. Either you play one ball with one dog sitting and waiting for his turn, or with two balls, you can read about it on the net, or ask here, in this Forum. By creating an environment and managing physical competition you would cease competition for higher status in your pack. Another thing - handfeed them both in one room, giving the priority to your Sage by asking Ryker to wait for longer. Both dogs must be sitting in front of you, you might need to tether them at the beginning of training. That is to train Rycker patience.