How to get milk?
More detailed, if I talk to a fresh cowgirl, I can get heart value 4, but undressing bra needs 6. Are the missing two supposed to be a favorite food and favorite drink? I've checked their favorite food but those food require milk as ingredient, which is not available before getting first milk. Favorite drink is somehow better, since quite a fraction of cowgirls want berry juice, which do not need any milky part.
In some older version, things were easier - there are more cowgirls whose favorite food do not have milk as ingredient.
Or this still exist in new version, but just my bad RNG?
Edit: it seems that there is another way - feed A LOT nutrient and gain their body part. But I don't know about the details.