Approximately 10% of respondents to the EA survey said the animal welfare was the most important cause: http://effective-altruism.com/ea/1e5/ea_survey_2017_series_cause_area_preferences/
Approximately 10% of respondents to the EA survey said the animal welfare was the most important cause: http://effective-altruism.com/ea/1e5/ea_survey_2017_series_cause_area_preferences/