This works about as well as any of the topical flea and tick control porducts. Doen't quite make it the full 30 days, but I have found almost all the products I have tried to be this way. Was buying it at Walgreens, but the 6-month supply blows that price out of the water.
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Ratings-Only Reviews for PetArmor 45 to 88 lbs. (6 Month)
Based on the average of (641) ratings-only reviews