Murder at the puppy fest / Laurien Berenson.

Enhanced descriptions from Syndetics:

As a busy mom and pedigree Poodle owner, Melanie has little time to spare. Still, she doesn't mind helping out at Puppy Fest, an annual fundraiser to benefit Puppy Posse, a local dog rescue organization. Considering the venue - Belle Haven mansion, owned by wealthy philanthropist Leo Brody - it's shaping up to be the can't-miss charity event of the summer. Unfortunately, when Melanie's breeding background lands her in the doghouse with Jane, Leo's snappy daughter who runs the rescue, Melanie finds herself simultaneously managing Puppy Fest and the millionaire's hopelessly fractious family. But once Puppy Fest kicks off, Leo is nowhere to be found - until Melanie discovers his current mistress crouching over his dead body. According to police, the father of nine's severe nut allergy went into overdrive after he accidentally consumed a contaminated cookie. However, Libby, one of Leo's children and a friend of Melanie's Aunt Peg, believes someone deliberately put him down for good. And now, she's begging a reluctant Melanie to unearth the secrets hidden by the Brody pack. But the closer Melanie gets to fetching answers, the higher the stakes become - and the more she realizes that she's chasing a criminal who's been groomed to win ...'