The ancient Greeks and Romans were more lavish than the modern world in their expressed affection for beasts. Theirs was a splendid opportunity to know animal life at first hand, not because there were more animals, but on account of the very close relationship effected by polytheistic principles and religious customs.1 Both literature and art attest that there were but few animals not dedicated to gods or goddesses; since religion penetrated ancient life so deeply, it is understandable that animals were freely admitted into the house, and gradually attempts were made to transform even the fiercer beasts into pets and companions.
Source: Greek and Roman Household Pets — CJ 44:245‑252 and 299‑307 (1949)