Attack of the Alien Dung!

Attack of the Alien Dung! by Gareth P. Jones (Illustrated by Steve May)
 
 The safety of Planet Earth depends on two secret agents with a major difference: one is a dog, and the other is a cat! Biskit, a dedicated canine agent, is horrified to be partnered with Mitzy the cat, but personal feuds must be set aside when the world is threatened by a cluster of flying cow pats whipping up a serious stink.
 
This hilarious comic caper, described as The Secret Life of Pets meets The X-Files, follows the unlikely duo as they attempt to save the town from a disgusting alien invasion.