What useful strategy combats inherited stubbornness during a 'down-stay' command?

Answer

Following a successful repetition with a quick game of tug or fetch

By immediately rewarding successful compliance with a highly motivating activity like play, the dog learns that following direction leads directly to a fun outcome, effectively bypassing mental resistance to pure repetition.

What useful strategy combats inherited stubbornness during a 'down-stay' command?
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