What do you need from a pet air cleaning product? Pets bring a few challenges to inside air. They shed hair, fur and feathers. Pets emit dander. Dander is tiny flecks of skin from cats, dogs, rodents birds and other animals. They track in dust, dirt and parasites from outside. Sometimes pets stink! Pets create a lot of indoor air pollution. You need an air purifier that will remove all these nuisances from the air.