in the evening give 1 to 2 drops of vinegar into 1 liter of fresh cow`s milk.let it stand overnight and in room temperature.add a small yogurt and a bottle of yakult.stir briskly and beat until the solution is like melted vanilla ice cream in consistency.this will last for a week if refrigerated.just get the amount you need during feeding.this homemade buttermilk is full of digestive bacteria and really good for our fowl.hahahahahahaha!:lol: :lol: