[mscat]

I only have one dog. So do not have experience with two puppies. However, watch a lot od dog training shows. What I have seen is that behaviors only become worse with age . It is important to take care of these issues now , than try and deal with them when they are older.
I would Feed Ace in a totally separate room. Without Arizona present. The thing is that little Ace may start losing weight, and not be getting enough to eat , because of Arizona's dominate behavior's. IMO, totally separate them when they eat.
I also would not try to give one puppy any more loving then the other. Although Ace is the more mild mannered one, and may need to be "protected" Your little Arizona is just going to become more and more demanding. If Acew is going to sleep in your bed, then giving her own bed in your room, I believe is the right thing to do. Are they pad trained? Can Ace jump off your bed safely? To potty during the night?
Since little Ace loves Arizona that is wonderful. Arizona was very young when she came to your house and I think she did not have time to learn social skills with her litter mates. This is part of the problem. She is a little rowdy, however, I think it can be dealt with. When you have toys for them, have two of the same toys . One for each puppy.
Puppies do play rough together t, but should not be hurting each other .