SCOTT SCANLON, co-owner of Invisible Fence of Northern Michigan, demonstrates a specially-designed animal oxygen mask on his puppy, Tess, in Glen Arbor. The company donated the pet oxygen masks to the Glen Arbor and Empire fire departments last week. Additional kits will be donated by the Traverse City company at an upcoming Leelanau County Fire Chiefs Association meeting. Fire officials estimated that 40,000 pets died in fires across America last year, with most succumbing to smoke inhalation.