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Stop Marking! discourages and helps stop dogs from marking and re-marking the same areas with natural deterrents. The lemongrass and peppermint oils left behind act as a natural deterrent and help prevent dogs from marking or returning to the same spot twice. Safe for pets 8 weeks of age or older when used as directed. For best results when targeting previously marked areas, use Skout's Honor Urine Destroyer or Stain and Odor remover (sold separately) as the first step to thoroughly remove stains before applying the Stop Marking spray.