As of my knowledge cutoff in October 2023, the "Best in Show" winner for 2024 has not yet been determined, as major dog shows like the Westminster Kennel Club Dog Show or Crufts typically occur later in the year or early in the following year. The "Best in Show" title is awarded to the top dog at these prestigious competitions, judged against breed standards for conformation, temperament, and overall excellence.

If you're referring to a specific event or competition, please provide more details, and I can offer insights into the process, history, or notable winners of such events. For the most up-to-date information on the 2024 "Best in Show" winner, I recommend checking official sources or news outlets covering the event after it takes place.