Purpose
A pet door is found to be convenient by many owners of companion animals, especially dogs and cats, because it lets the pets come and go as they please, reducing the need for pet-owners to let or take the pet outside manually, and curtailing unwanted behaviour such as loud vocalisation to be let outside, scratching on doors or walls, and (especially in the case of dogs) excreting in the house. They also help ensure that a pet left outdoors can safely get back in the house in the case of inclement weather.
Read more about this topic: Pet Door
Famous quotes containing the word purpose:
“Our policy is directed not against any country or doctrine, but against hunger, poverty, desperation and chaos. Its purpose should be the revival of a working economy in the world so as to permit the emergence of political and social conditions in which free institutions can exist.”
—George Marshall (1880–1959)
“Satire exists for the purpose of killing the social being [for the sake of] the true individual, the real human being.”
—D.H. (David Herbert)
“And the purpose of the many stops and starts will be made clear:
Backing into the old affair of not wanting to grow
Into the night, which becomes a house, a parting of the ways
Taking us far into sleep. A dumb love.”
—John Ashbery (b. 1927)