Attack of the Alien Dung!

Enhanced descriptions from Syndetics:

The Pet Defenders Code: 1. The safety of Planet Earth depends on you. 2. Humans MUST NOT know the truth. GOOD LUCK - you'll need it...
From Gareth P. Jones, winner of the Blue Peter Award and author of successful young series fiction, including NINA MEERKATS, comes a brand-new comic caper. THE SECRET LIFE OF PETS meets THE X FILES - Pet Defenders are secret agents with a difference.
It's up to Mitzy and Biskit to save the world from alien invasions - just so long as they can stop fighting like cat and dog for long enough to do it!
Secret agent Biskit is not happy when he discovers his new partner Mitzy is a cat - everyone knows that cats and dogs don't mix. But saving the earth from alien invasions must come first and the planet is under attack! A cluster of cow pats has flown into town and they're whipping up a stink... It's time for Biskit and Mitzy to put aside their differences and kick some alien butt!
For fans of funny and action-packed animal adventures including Andrew Cope's Spy Dog series, Astrosaurs and Jeremy Strong.