Chicken
From WoWWiki
Chickens are neutral level 1 critters found in many areas of Azeroth. They are particularly numerous near human settlements in the Hillsbrad Foothills, Westfall and Duskwood.
If a player targets a chicken and uses the emote "/chicken" numerous times, the chicken may eventually offer the easter egg quest 
[1] CLUCK!.
Other forms of chicken come in mechanical and beastly form.
Other chickens
-
[1] "Plucky" Johnson - a polymorphed human apprentice in the Thousand Needles
- Ancona Chicken - a small pet purchased from Magus Tirth
-
[50] El Pollo Grande - a giant black chicken summoned in Felwood
- Gnomish Battle Chicken - an engineered mechanical attack chicken
- [50]
Oglethorpe Obnoticus has several mechanical homing robot chickens:
- [42] Homing Robot OOX-09/HL
- [42] Homing Robot OOX-17/TN
- [42] Homing Robot OOX-22/FE
-
- Mechanical Chicken - a small pet reward from the quest [50] An OOX of Your Own from Oglethorpe Obnoticus
- Prairie Chicken - a small pet reward from the CLUCK! quest
- Upon the completion of
[10] Operation Recombobulation, the quest giver, Razzle Sprysprocket, starts an action sequence that turns a captive leper gnome into a chicken, which then runs off. If you follow it out the door, it runs a short distance, then fades away.
