Note 7 — COOK’S ORACLE:

“Animal Food being composed of the most nutritious parts of the food on which the animal lived, and having been already digested by the proper organs of an animal—requires only solution and mixture—whereas vegetable food must be converted into a substance of an animal nature by the proper action of our own viscera, and consequently requires more labour of the stomach, and other digestive organs.”—Burton on the Non-Naturals, p. 213.