Wikipedia's entry on Heifer International reads:
Animals such as goats, water buffalo and camels are “seven M” animals: they provide meat, milk, muscle, manure, money, materials and motivation. Once its immediate needs have been met, a family is free to sell any excess at market. Heifer International provides a breeding animal along with the gift animal so that it can produce offspring. Participating families are required to “pass on the gift”, that is: they must give at least one of the female offspring to a neighbor who has undergone Heifer’s training. In time, that neighbor will pass along one of the offspring of its animal, and so on.We're trying to raise $1,000 for the "Milk Menagerie". If you want to participate, you can join Team Bloggernacle by clicking here.