Cat on the Scent by Rita Mae Brown and Sneaky Pie Brown.
Totally a beach read type book (don't throw things at me, you cat lovers!), not much to comment on. Very cutesy--the animals talk to one another, and they really solve the mystery.
The thing I really didn't like? The humans never did figure out what happened, and the culprits paid no price. Sorry. I read mysteries and the like to have the good guys win (or at least be vindicated) and the bad guys be found out. Not to have it turn out like real life usually does!
One good quote:
...If people no longer dress as they should it's an outward sign that they've lost all sense of propriety. Dress isn't superficial.