People always want realism, so think it would be cool that after a calf is born there would be afterbirth, it's basically the stuff that comes out of an animal after giving birth. Sometimes called mung or Placental expulsion and it makes *a mess* like when you kill a chick. you could use it in a recipe, perhaps "mung salad" or *placental delight*. Which would be like beetroot leaves and afterbirth, perhaps it could become a sought after fep food.
Heres a pic it could look like.