And a 13 week old pup isn't a baby no it's a puppy.see how small a pups stomach is why full it with liquid and not wholesome solid food you wean a pup from milk onto solids why then go backward again
She doesn't get the milk instead of wholesome solid food. She gets it on top of her 3 meals a day.
I don't think there would be any benefit in swapping the milk for a 4th solid meal.
It is full of calcium, vitamins, minerals. She enjoys it and it is a warm drink in her belly on a cold morning or evening.
Like I said my adult bitch has it regular as a treat on a cold morning or after a hard