Chalav Akum

What are the required conditions for a non-Jew to milk a Kosher animal if they also own a non-Kosher animal?

When is the Jew’s supervision sufficient?

Practically, can chalav goyim be consumed?

According to most opinions, it is forbidden because it was enacted by a beis din of great wisdom and number.
According to a psak of Reb Moshe Feinstein, government regulations act as supervision
According to some opinions, it is forbidden regardless of government regulations because the enactment was in order to create a separation between Jews and non-Jews
The Chabad rebbeim instruct that it is spiritually detrimental
All of the above are correct

What is the reason behind the prohibition against non-Jewish cheese?

What is the halacha of non-Jewish cheese made under Jewish supervision?

According to the Rama, when must there be supervision when making non-Jewish cheese?

There is no need for any supervision.
Both during the milking and during the curdling of the milk.
Lechatchila, also during the milking; bedieved it is allowed if the supervision was onlu during the curdling
Only during the curdling

What is the halacha of non-Jewish milk powder?

What is the halacha of non-Jewish butter in a place that doesn’t have a specific custom?