FRESH colostrum from first or second milking of cows after calfing.

baby cow gets all it wants on the first drinking after birth.  then the mama is milked later in the day.  baby cow gets all it wants after that and the next day, then we have second milking availalbe.

first milking has more protein and can set up in common latin flan or Indian dessert dishes, where it sets up without the added need for egg yolks in the recipe.  2nd milking is smoother and more milk-like, though still high in fats and proteins.