Currently, there may be 50,000 or more animal protection organizations around the world with total annual income amounting to $6-8 billion. The animal protection movement has experienced significant growth in the 21st Century.
Rowan, Andrew N.
"Global Animal Protection,"
WellBeing News: Vol. 1
, Article 1.
Available at: https://www.wellbeingintlstudiesrepository.org/wbn/vol1/iss9/1