It's hard to say not being there but your fears may be feeding the situation.
With both sets of Barker Sisters, the youngsters got firmly put in their places a few times - this was regarding the older dogs' feed bowls.
Experiences are different of course but in the first case, BTE1 really really really needed someone to boss around. She was thrilled to have a puppy in the house. In the second, BTE2 was very disappointed not to have Mr. Beefy or his clone but a 10 to 12 week old bitch.