He is best known for writing, directing and producing the 2005 documentary Earthlings, which covers animal rights issues within industries such as pets, food, fashion, entertainment, and animal testing.
Ia dikenal karena menulis, menyutradarai dan memproduksi dokumenter 2005 Earthlings, yang menyoroti masalah-masalah hak asasi hewan dalam industri-industri seperti hewan peliharaan, makanan, mode, hiburan, dan uji coba hewan.