Chet and Bernie are a team. Bernie is a private investigator and Chet is his dog. Chet is also the narrator of the book.  In this second book of the series, Chet gets a look inside the world of dog shows  and  loses Bernie for a while.
 " That meant no one had a clue, so there was no point even thinking about it. I'm the type who can stop thinking about something in a flash, so I did"  Quote from Chet.