The Snake Mistake Mystery: The Great Mistake Mysteries by Sylvia McNicoll

His father is running a dog walking business and Stephen and his good friend, Renee, work for him.  They love the dogs, have fun walking around town and they use liver treats to make them behave.  All is going well until someone accuses the father of stealing from the houses.  He has the keys and they weren't broken into so it had to be him, right?

Dundurn and Edelweiss allowed me to read this book for review (thank you).  It will be published February 20th.

Stephen knows his dad didn't do it.  So he and Renee start looking for clues.  Renee's brother gets in trouble for graffiti and part of it wasn't his.  They are trying to find a pet to feed him and eventually they realize the snake is missing.  (They didn't even know it was a snake.)  Renee decides to adopt a mouse.

There's lot of action, fact finding is confusing but at the end, Stephen works out what happened and gathers the involved people together to tell them.  He manages to turn a disaster into good promotion for the company and that's a win win for them!