Related su Levitico 7:78

Anything that is specifically for eating and Biblically prohibited, even though it is not forbidden to derive benefit from it, is forbidden to do business in it. Rema: Or to lend with it as collateral. And even to purchase it to feed it to one’s idol worshipping workers is forbidden. Except for Biblically prohibited fats because the Torah says in regard to it: “it may be used for all kind of work” (Lev. 7:24). And if impure wild animals or birds or fish happened into the trap of a trapper, Rema: Additionally one into whose house happened a nevelah or treifah, he is permitted to sell them, assuming that he did not intend for them to come into his possession in the first place. Rema: And he needs to sell them immediately and not to wait until they become fat in his possession. And it is also permitted to collect impure things from an idol worshipper for a debt because this is like rescuing [what is yours] from their possession. It is forbidden to sell an idol worshipper nevelah claiming that it is kosher. And anything that is only prohibited rabbinically, it is permitted to use it for commerce.