Nicki (American Girl Today)

Nicki Fleming is a 10-year-old girl who is a natural with animals. She lives on a working Colorado ranch with her parents and younger brother. She is optimistic, generous, and compassionate, and she loves skiing almost as much as she loves animals.
Nicki has a hard time saying "no" to people. Whenever anyone asks for her help, she's ready to lend a hand. When Nicki says "yes" to becoming the main trainer of a service dog that she and her mother had planned to train together, Nicki ends up in over her head, and struggles to juggle multiple responsibilities: to her parents, her best friend, her teacher--and to the dog.
But in the process of training the lively and spirited Sprocket, Nicki's affection for him grows--even while she keeps reminding herself that she has to give him up to someone who needs him more than she does. Equally important, Nicki learns some important lessons for herself.
Book One ends with the with big test--and success!--of Sprocket's potential as a service dog, and Nicki's deep pride in their joint accomplishment.