Armor Class: 7 
Hit Dice: 1
Attacks: Beak or Claws for 1-2 hp
Saving Throw: 18
Special: Poison (see below)
Move: 6/15 (when flying short distances)
Challenge Level/XP: 1/15
Found in underground places, both genders of the Dungeon Chicken appear nearly identical to everyday roosters except that their combs and wattles are green instead of red. These are actually poison producing glands - similar glands of the same color are also located on their heels. They allow the sharp peck or claw of the Dungeon Chicken to deliver a poison whose effect is to cause fear and hysteria in the victim (treat as Fear spell: failure to Save causes character to flee in horror, with a 60% chance they will drop whatever they’re holding, effect lasts for one hour). They normally avoid conflict but will defend themselves vigorously if attacked or approached menacingly, or if they feel their offspring are in danger.
Dungeon Chickens are just as edible as their normal cousins, and while their eggs are not strictly poisonous, they can have strange magical effects. Even so, these creatures are sometimes kept as a source of food by underground dwellers such as kobolds and goblins. Their poison soon loses its efficacy after exposure to air, but some alchemists are said to have overcome this.
GIMP'd image, original here:
http://www.flickr.com/photos/travlinman43/ / CC BY-SA 2.0
text of this post released under the OGL