Thank goodness for “No-Go!” We adopted a two year old Weimeraner who kept urinating in the same spot that our 3 year old Black Lab did when we first got him. I guess his smell was still there! Nothing worked and my husband was at his breaking point. We bought this product out of desperation. Before spraying, he had been urinating every single night. It’s been 10 days since spraying and no messes!