
The Pet Day Mystery by Mary Blount Christian, illustrated by Joe Boddy, 1989.
This book is part of the Sherlock Street Detectives series.
It’s Pet Day at school, and twins Walter and Ann are bringing their dog, Watson, and their cat, Fuzz Face to school with them. Watson is really Walter’s dog, and Fuzz Face is Ann’s cat. The school bus is chaotic and noisy because the other children have their pets with them, too.

At school, each of the kids tells the rest of the class about their pet. When it’s time to go to lunch, the kids give their pets food and water and leave them in the classroom.

When they come back from lunch, a pair of hamsters are missing, and their owner, Tina, thinks that Fuzz Face might have eaten them. Ann points out that Fuzz Face couldn’t have eaten the hamsters because Fuzz Face was in his cage during lunch.

The kids figure that the hamsters are probably hiding somewhere in the room, and they ask Tina to tell them everything she knows about the hamsters so they can find them. They use what Tina tells them about the habits of hamsters to figure out where they are.
The book is available to borrow and read for free online through Internet Archive.

My Reaction
It’s a fun picture book mystery, but it’s also educational, like other books in the series. The information the kids give about their pets is true. Some of them say where their pets originally came from, like Pedro, who says that his pet parrot is a breed that comes from South America. Ann mentions that her cat takes vitamins and has to go to the vet sometimes, like people have to visit their own doctors. I liked how the characters use facts about the behavior of hamsters to figure out where the hamsters went.
I was a kid about the age of the characters at the time this book was published, although I don’t remember reading this book at the time. When I was in kindergarten, the year before the book was published, we had a special pet event in my class, but we didn’t do it like the class in this book. As I recall, different people brought in pets on different days so it was less chaotic and there was no chance of one pet eating another, which is a real risk. Also, all pets had to be in cages to keep them from running away or causing trouble, and they were never left unattended. My mother helped me bring our pet birds to class, and she took them home with her immediately afterward, so they weren’t left sitting around the classroom.
The book has a vocabulary list and glossary in the back.