The Creeper Chicken is an interesting addition to Minecraft. It definitely applies a new tactic to the game that you may not have realized you needed. It turns regular chickens into green gunpowder laying chickens.
All you need is a creeper head combined with two seeds and that will get you creeper treats. Just give one of these to a chicken and stand back if you can.
The aftermath is a bit explosive but a creeper chicken is born!
They lay gunpowder eggs that can be broken down into usable gunpowder or you can just throw it as an explosive projectile.
You can also breed them using TNT!