Halal jamón products made with lamb and beef inside the Balkis Gourmet curing room in Cumbres Mayores in Andalusia, Spain. Lauren Frayer for NPR hide caption

itoggle caption Lauren Frayer for NPR

Ritually slaughtered lamb is delivered at a halal butcher shop in The Hague, Netherlands, in 2011. Denmark, Sweden and Norway are among the countries requiring animals to be stunned before slaughter. Dutch lawmakers took up the issue in 2012. Peter Dejong/AP hide caption

itoggle caption Peter Dejong/AP