Thats why you train them while they are young to hop up on the milk stand can have their collars clipped while they eat. Never lost a drop of milk. Bucks smell so disgusting but we kept an old sock in a half pint canning jar. The breeder rubbed one of her bucks down with it. Sealed the jar good. If you doubted when your doe was in heat give them a whiff. We also watched backsides and kept track on a calendar. Hop into the hatchback when its time, drive about an hour and the goat hops out, and about 3 minutes later she is back in the car. Always hit it right.
LOL! The reason our Beagle, Chief, was so valuable, was that he could tell you about a week in advance when a female was going into heat.
He helped us bring lots of puppies into this world, though the poor guy never had a family of his own. :(