Time to Fly #10 (Vet Volunteers) Reprint edition

There's a flock of parrots in Zoe's backyard! No one knows where they came from, but they aren't as big a surprise as the sight of Zoe's mother, who has just arrived from California. She wants Zoe to move back home with her - something Zoe has been waiting to hear for months. But why does leaving Ambler and Dr. Mac's place seem so much harder than she expected?