Madeline Finn and the Therapy Dog

Madeline Finn hopes Star can become a therapy dog. But first he needs to pass his test. They have been practicing all the skills he needs to master.
They practice meeting people.
They practice sitting still when a bike goes by.
They even practice meeting other dogs.
Now Madeline Finn and Star are off to Walker Oaks, a retirement community where Star will take his tests. They face a variety of challenges and meet several new friends.
But Madeline Finn can’t stop thinking about an elderly man in a wheelchair, who never smiles. Is there something she and Star can do to help Mr. Humphrey?