I've learned so much in the last month since Peanut joined our pack. What we were worried was aggression by the older dogs was just them teaching her proper doggie manners. The not only get along now, but she is respectful of them. Even when they are eating and she has finished hers. They all play so much and it brings us much joy to watch. She will be a much more balanced and happy dog, I'm so thankful I didn't intervene. (DH sometimes thought I should punish them, but I prevailed.) I'm grateful for everyone here who reassured me it was normal.
He prayeth best, who loveth best, all creatures great and small.