Or a vegetarian eating cheese when there is cow stomach in it (rennet). American "cheese" product probably uses bacterial derived enzymes though, but any cheese that is actually worth eating uses rennet because the flavour cannot be reproduced with enzymes.
Or a vegetarian eating cheese when there is cow stomach in it (rennet). American "cheese" product probably uses bacterial derived enzymes though, but any cheese that is actually worth eating uses rennet because the flavour cannot be reproduced with enzymes.