Goat Milk
Goat milk is used for human consumption. In fact, more people in the world drink goat milk than cow milk, although in the US the opposite is true. Goat milk is similar nutitionally to cow milk, but it contains smaller fat globules and as a consequence it is easier for some people to digest and it does not require homogenization.
Goat milk is also used to feed many other animals. Usually, they are bottle feed, but goats will fairly easily adopt lambs (with a bit of coaxing), and we've even heard of a goat who would jump up on bale of hay to allow a foal (baby horse) to nurse.