We have ordered a new-fangled doo-da that feeds calves automatically - it's coming from Germany in 6-8 weeks. The calf in the far background is in a chute at a nipple receiving milk at a farm that already employs this technology. Calves eat "free range" instead of being hand-fed or drinking from a bucket.
This machine mixes warm milk replacer to order and each calf only gets the amount programmed into the code from an electronic collar or tag. It costs about as much as hiring someone to do that job for a year.