Get this Link Plus Smart Dog GPS Tracker for only $49.99 after a price drop from $79 at Walmart. You save 37% off the retail price for this dog GPS tracker. Plus, this item ships free. This is the lowest price we could find online by about $30. The Link Plus Smart Dog GPS Tracker includes a tracking unit, collar carrier, base station, and charging cord. Sales tax is charged in most states. Deal expires soon.