The Cat, the Professor and the Poison: A Cats in Trouble Mystery by Leann Sweeney

Between her kitty quilt-making business and her three beloved cats, Jill has her hands full. That doesn't stop her from wanting to solve the mystery of the milk cow that's gone missing from her friend's farm. But imagine her surprise when a stolen cow leads to the discovery of fifty stray cats and one dead body-a victim of cold-blooded murder...