North Shore Animal League America is the largest example of what kind of animal shelter and protection organization?
North Shore Animal League America: North Shore Animal League America, headquartered in Port Washington, New York, is the largest no-kill animal rescue and adoption organization in the world. No-kill shelter: A "no-kill" shelter is an animal shelter that does not kill healthy or treatable animals even when the shelter is full, reserving euthanasia for terminally ill animals or those considered dangerous to public safety. No-kill shelter:  A no-kill shelter uses many strategies to promote shelter animals; to expanding its resources using volunteers, excellent housing and medical protocols; and to work actively to lower the number of homeless animals entering the shelter system.
no-kill shelter