Imaginary friends

This is about a Shetland collie/ Dalmatian. Her name is Meeka and she has a sis named Brooke, but will this story have a plot twist? Or worse. Would sharp, cry, whistle and rage still be here? Would Balto realize his mistake? (If your confused on when I put /right now/ it's because when I put that she is older and telling you guys about the past)