Do the math on the amount of milk your cow is producing per hour. My Lucy gives well over 6 gallons a day during her high production period. That's more than a quart an hour, or over a half pint every fifteen minutes. If you are takng 45 minutes to milk, your cow has produced close to a quart of milk while you're milking; my backwoods logic at work here. When I use my faster than by hand milking machine I can get Lucy pulled down pretty dry, but during the same periods if I do milk by hand I cannot get her stripped dry. She can make milk nearly as fast I can squeeze it out; well..., too fast for me to strip her dry.