Enemy of My Enemy — Richard Alan Dickson

The space cats gear up for war. With the Reaper's resonance chamber ready to destroy Katlantis, the cats race to put it out of action. But before they reach the Iceberg and the costly battle begins, Growler the Mutt stops them with a sneaky and tempting proposition. Those who lie with dogs wake up with fleas, but Growler's offer may simply prove to be too good to refuse.

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Cat Patrol Delta, Series Description:

For generations, the Canine Cartel and the Space Cat Alliance have warred across the galaxy. On a mission to investigate an enemy signal, Cat Patrol Delta crashes on the little-known planet Earth, damaging its ship in the process. Delta discovers a war between cats and dogs on Earth, too... and the cats are losing.

Stranded, Cat Patrol Delta offers to help with the war. Four space cats should be more than a match for the Earth dogs, but Delta soon learns that it isn't the only extraterrestrial combat unit on the planet. The Reaper and his Canine Cartel have landed troops on Earth, as well. It's Cat Patrol Delta to the rescue and doom to all the dogs!