HAPPY JACK Mange Medicine & Treatment for Dogs & Horses - Brings Soothing Itch Relief to Severe Mange, Fungi, Allergies, Eczema & Most Dog Skin Irritation (8 oz) is up for auction in Pet Supplies. The current bid is $3.00, 90% below the $30.40 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.