Probable claws by Clea Simon

In ten words or less: Club scene reporter meets shelter workers; accused of killing veterinarian.

Review: Theda Krakow is a freelance reporter who writes about the Boston club scene. She's also a cat lover whose friends run a no-kill shelter. When a cat gets sick from tainted kibble from the city shelter, Theda decides to investigate. And when she discovers the body of the city veterinarian stabbed with a scalpel, she's arrested for murder.
Her boyfriend, a retired cop, bails her out but warns her to leave the investigation to the police.
Why bother? A heavy overload of cats and the club scene was too much, even for this cat lover.