An important part of the dairy industry is the removal of the calves off the mother's milk after the three days of needed colostrum, allowing for the collection of the milk produced. On some dairies, in order for this to take place, the calves are fed milk replacer, a substitute for the whole milk produced by the cow. Milk replacer is generally a powder, which comes in large bags, and is added to precise amounts of water, and then fed to the calf via bucket, bottle or automated feeder.