If they work, they'll make aging dogs feel and act healthier, younger, and more vibrant. Boo, an 11-year-old whippet dog from Pennsylvania, is the very first participant in this clinical trial, from the veterinary medicine startup Loyal. The new STAY study is one of the largest, most diverse dog aging studies of its kind — with plans to enroll more than 1,000 aging dogs across 50 different US sites. Advertisement"A clinical trial doesn't mean the drug works — it means we're going to test whether it works," aging expert Daniel Promislow, who directs the Dog Aging Project , another large study of aging dogs, told Business Insider. (Promislow is not involved with Loyal's drug development.)

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Persons: —, LOY, Daniel Promislow, Ellen Ratcliff, Celine Halioua, Ratcliff, it's Organizations: Service, Business, FDA Locations: Pennsylvania, mealtimes, LOY