Deer are very peaceful animals, despite their majestic antlers they really don't want to attack you! Sometimes it can even be annoying because he will avoid you anyway. They like wheat and hay, so this is a good tip if you want to tame one of these to carry items in chests! They also love to make big jumps around, and can be found with or without antlers! I would say they look like a mix of a llama and a goat... apart from the spitting part, they don't do that, it doesn't fit with their delicate and sophisticated personality!