Doris day is committed to protecting animal rights. She was one of the first Hollywood actresses to advocate not wearing animal fur clothes. She founded animal protection organizations "doris day Animal Foundation" and "doris day Animal Alliance", and also ran an animal hotel, which was named after her only son Terry melcher before her death. Doris day is a vegetarian, and her website "Animal League of doris day" has information about vegetarianism.

Like her lifelong friends Rona Reagan and Ron Hudson, as well as james stewart, clark gable, james cagney, bob hope, Caleb Glenn, Frank Sinatra and Ginger Rogers, doris day is a Republican supporter. Among them, ginger rogers, who is 1 1 years older than her, is her idol in her girlhood; She cooperated with Hudson many times and was a popular screen couple in 1950s and 1960s.

Doris day's four consecutive marriages ended in divorce or widowhood. Since the death of her only son, she has lived in seclusion on a farm in California, taking in many injured, sick or abandoned animals at any time.