Bad Kitty Puppy's Big Day by Nick Bruel

Bad Kitty's in a bad mood . . . a very bad mood, and Puppy is not helping.

Enter Uncle Murray, who's tasked with taking care of Puppy for the day, but that's when the trouble begins. When they go on a walk through the park, Uncle Murray almost gets himself arrested while Puppy ends up in the pound, where he meets some very peculiar new pals.