Give the Dog a Bone - Allie Babcock Mysteries, #3

As canine shrink Allie Babcock knows, behind every neurotic dog stands a neurotic human. But the rambunctious golden retriever named Maggie can't even begin to compete with the nuttiness of her owner. Befuddled millionaire Ken Culberson insists that he killed his wife and that Maggie is channeling her spirit. He talks Allie into becoming the dog's legal guardian in case he, too, should die-which he promptly does, thanks to a murderer.
Friends and relatives immediately gather to sniff after the fortune that will go to whomever Allie picks to be Maggie's new owner. Wondering who in the pack did the deed, sleuth-hound Allie vows that Maggie and her millions will only go to a killer over her own dead body.