- Entity data
- Tags common to all entities see Template:Nbt inherit/entity/template
- Tags common to all mobs see Template:Nbt inherit/mob/template
- Additional fields for mobs that can breed see Template:Nbt inherit/breedable/template
- IsChickenJockey: 1 or 0 (true/false) - Whether or not the chicken is a jockey for a baby zombie. If true, the chicken can naturally despawn and drops 10 experience upon death instead of 1-3. Baby zombies can still control a ridden chicken even if this is set false.
- EggLayTime: Number of ticks until the chicken lays its egg. Laying occurs at 0 and this timer gets reset to a new random value between 6000 and 12000.