Minecraft wiki entry for Development_versions, associated text: Spawn as red foxes in snowless taiga biomes, and as snow foxes in snowy taiga biomes
Can be bred with sweet berries.
The newborn fox trusts and defends the player.
Can pick up and carry items in their mouths.
May eat and drop what they are carrying.
Wolves and polar bears attack them.
Attack chickens and rabbits.