It shall be unlawful for a person to sell, offer for sale, trade, barter or give away in the city any live animal, bird or reptile as a novelty, prize for or as an inducement to enter place of amusement, or offer such a vertebrate as an incentive to enter any business establishment or enter any business agreement whereby the offer was made for the purpose of attracting trade or business, other than establishments selling animals as their primary business.