Milking

Milking is exactly what it sounds like: talk a hoofed beast into filling your vessel. Take any wide-mouth vessel fit for the job -- a bucket, a jug, a roomy jar or the famous milk-can -- see that it is open and not already full of something else, then type use <vessel> <creature>.

What ends up inside depends on the creature you picked. A female gives honest white milk; anyone else gives... well, not-milk -- yellowish, and best not asked about. Either way the beast needs a short rest before it can be milked again.