Let's just put "unhealthy animals" in the "outlaws of commerce" category, shall we?If you can tell me what it was that made the other articles they'd dealt with "outlaws of commerce", and in what context they were being dealt with, maybe we can.
"If the facility of interstate transportation can be taken away from the demoralization of lotteries, the debasement of obscene literature, the contagion of diseased cattle or persons, the impurity of food and drugs, the like facility can be taken away from the systematic enticement to, and the enslavement in prostitution and debauchery of women, and, more insistently, of girls."
-- Justice Day,
Hammer v DagenhartThere's five. Look them up yourself.