Americans are bringing home less bacon as pork prices have jumped 8.5% over the last year. Now animal-rights activists in Massachusetts are piling on costly farm regulations that could inflate pork prices and cause shortages across the Northeast.

Bay State voters in 2016 approved a referendum that would prohibit the sale of products from farms that confine “any breeding pig [sow], calf raised for veal, or egg-laying hen in a way that prevents the animal from lying down, standing up, fully extending its limbs, or turning around freely.” Hog farmers would be most affected since nearly all are housed in individual pens.