Cow giving the wrong quality of milk

[MagicManICT]

When items are averaged, they're averaged as integers, so any remainder is dropped, not rounded. This should be changed in the next update (according to post by jorb in the last update). If you put in anything that lowers one of the quality values so it goes down, it drops the quality instead of being averaged out. It quickly becomes a downward spiral.

Until that change occurs, only put fresh fodder into an empty trough. If need be, use buckets to empty the old one.

Also to note, this is the way it has always worked if you wanted to get any real increases to quality. It was easy to empty out troughs, though, by picking one up and right clicking another (assuming that is still a thing, but haven't gotten any livestock yet).

[jorb]

There should be a way to check the Q of the food in the trough

There is. Get a bucket and take some swill out.

Malnourishment and poor swill quality affects the milk. This is most likely not a bug.

[kris_hole]

Yeah the quality of the swill was the cause of the milk. However the "damage" or whatever it stands for in the first bar I don't understand how that's happened, the trough has always covered the entire area where they're locked in and its always had food in.

Apparently its a lot easier to drop quality of swill than it is to raise it.