Horses are a new minecraft thing. They have a new thing called a rope in the prerelease It is not named yet. To make horses your friend (or owner) you have to feed them. To feed them you give them weat (in survival mode) if you spawn a baby you give them two stacks of weat. One stack makes it grow into a full adult the other one just makes it your friend. Oh and theres this other new thing called hay again it hasn't been named. The horses can't eat it though.This is a rope on fence

     This in my hand is a rope