What dog cost $1 million dollars?

Excuse me, could you elaborate on the statement that a certain dog was valued at a staggering $1 million dollars? I must admit, this piques my curiosity greatly. Could you please provide more context? Was this dog a rare breed, perhaps with exceptional lineage or outstanding achievements? Or was there some other extraordinary factor that contributed to its sky-high price tag? I'm eager to learn more about this extraordinary canine and the reasons behind its unprecedented value.