Egg

An Egg is one of the four added items for the 0.7.0 update in the Minecraft PE. Eggs are dropped by Chickens and crafted to make Cake, and Pumpkin pie. They can also be thrown & gives it a small chance of a baby chicken spawning on the landing.

Miscellaneous Glitch
There was a glitch regarding to eggs. In that way, you can throw eggs rapidly like a machine gun. Experimented on June 16, 2013.

Procedure: First, equip the bow and put egg behind the selection. As you will do this, charge the bow in its highest level. Next, try not to release the bow, instead, select the egg and it will release its charge as the glitch will work.

For easier way, try to go near to a block when you charge the bow in the highest, but try not to highlight it (if you don't follow, then the block will destroy and cancel the process). Then switch to egg and here you go.

Trivia

 * There is a one in ten chance of spawning a baby chicken.
 * Sometimes they can spawn multiple chickens at once, but it is very rare.
 * They can be thrown from a far distance, like Snowballs, they do a slight amount of damage.
 * There is a 1 in 256 chance of 4 chickens spawning.
 * Before the 0.8.0 update the eggs worked similarly to spawn eggs, in the way that, they would sometimes spawn adult chickens. In 0.8.0 this was changed so only babies would spawn.