There is provided an animal feed, an anticoccidial agent, and an anticlostridial agent having less harm and an excellent prophylactic and/or therapeutic effect for coccidiosis and clostridial disease. Also provided is a prophylactic and/or therapeutic feed for coccidiosis containing pinene, thymol, eugenol, and limonene an anticoccidial agent containing pinene, thymol, eugenol, and limonene as active ingredients a clostridial disease prophylactic and/or therapeutic feed containing pinene, thymol, eugenol, and limonene and an anticlostridial agent containing pinene, thymol, eugenol, and limonene as active ingredients.