First Responders with the Minocqua, Hazelhurst, Woodruff and Arbor Vitae Fire Departments are now some of the best equipped in the nation to save a pet's life. Invisible Fence of Northern Wisconsin has donated four pet oxygen mask kits to the departments. This donation is just a small part of Invisible Fence® Brand's Project Breathe program, which was established with the goal of equipping every fire station in America and Canada with pet oxygen masks.