I absolutely loved Robert Repino's Mort(e), his first installment in the War with No Name series.
The ants are pissed off. Their queen has spent hundreds of years plotting complete victory. Humanity, of course, is totally surprised when giant ants burst forth from the earth and besiege their cities, and totally overwhelmed when the rest of Mammalia suddenly becomes sentient and goes on the attack.
Mort(e), a former house cat once named Sebastian, becomes a hero of the War. His heart, however, is set on finding Sheba, the neighbor's dog who was also his best friend.
This post-apocalyptic future where animals are just as human as humanity is just wonderful! Repino builds an amazing world where the animal characters are vivid and understandable, and the story gripping.
I have not yet read Cul de Sac or D'arc, the second and third books in the series, but will report in short order. Cul de Sac was a wonderful character in the first book, and I enjoyed the small bits we got of his perspective.
Morte (War with No Name) by Robert Repino via Amazon