Nearing the end of his life, Enzo, a dog with a philosopher's soul, tries to bring together the family, pulled apart by a three year custody battle between daughter Zoe's maternal grandparents and her father Denny, a race car driver.

A stinky cat hides when it's time for a bath.

"Speck is not a good boy. He is a terrible boy, a defiant, self-destructive, often malodorous boy, a grave robber and screen door moocher who spends his days playing chicken with the Fed Ex man, picking fights with thousand-pound livestock, and rolling in donkey manure, and his nights howling at the moon. He has been that way since the moment he appeared on the ridgeline behind Rick Bragg's house, a starved and half-dead creature, seventy-six pounds...

Roddy is a decidedly upper-crust "society mouse" who lives the life of a pampered pet in a posh Kensington flat. When a sewer rat named Sid comes out of the sink, he desides he had hit the jackpot. Roddy schemes to rid himself of Sid by luring him into the "whirlpool." Sid may be an ignorant slob, but he's no fool, but it is Roddy who winds up being flushed away into the bustling sewer world of Ratropolis. There Roddy meets Rita, an enterprising scavenger...

"Mason and Ty were once the very best of friends, like two nerdy sides of the same coin . . . until seventh grade, when Ava Petrakis came along. Now Mason can trace everything bad in his life to that terrible fight they had over the new girl. The one thing he'd give anything for is a do-over. But that can't happen in real life--can it? As a science kid, Mason knows do-overs are impossible, so he can't believe it when he wakes up from a freak accident...

When he is paired with a girl who has lost her legs, Rescue worries that he isn't up to the task of being her service dog.