Before the random event update in 2014, Evil Chicken would immediately start attacking players upon arriving, using a Magic-based attack which is low-hitting but extremely accurate and rapid. This made him very dangerous for players who are low on Hitpoints or unattentive. Players were forced to either fight and kill the chicken or run away from it. If you managed to kill him, he dropped between 32-750 feathers, raw chicken, and bones.
The Evil Chicken could not be attacked by anyone besides the player to whom he appeared. If the player took too long to kill him, or if they were in range but not attackable (such as if they are in a different room), the Evil Chicken would get bored and leave. The chicken could not move from the spot in which he has appeared, so if a player stepped on top of him, instead of moving to the side as other monsters will, he would shout "Get off of me!," and use a special attack which will push the player aside.
The Evil Chicken's combat stats used to vary depending on the player's combat level.
|Player level||Evil Chicken level||Hitpoints||Max hit|
Item Quantity Rarity GE market price Bones 1 Always 89 Raw chicken 1 Always 69 Feather 100–200 Always  300–600 Evil chicken's egg 1 Always  Not sold
- The quantity of feathers dropped is increased to 150-250 if a Ring of wealth is equipped.
- During the quest Recipe for Disaster
- The examine text "A Fowl Beast" is a pun, as "fowl" means bird, and is a homophone of "foul" which means evil.
- The evil chicken spawns un-aggressively to players at the Champions' Guild near Varrock. When a player attacks it, the chicken will attack the player and give the same attack dialogue.
Subquest of Recipe for Disaster
• • • • • • • • • • •
Agrith-Naar • Agrith-Na-Na • Arrg • Barrelchest • Black demon • Black Knight Titan • Bouncer • Chronozon • Corrupt Lizardman • Corsair Traitor • Count Draynor • Culinaromancer • Dad • Dagannoth mother • Damis • Dessourt • Dessous • Elvarg • The Everlasting • Evil Chicken • Fareed • Flambeed • Gelatinnoth Mother • Giant Roc • Giant scarab • Glod • Ice Troll King • The Inadequacy • Jungle Demon • Kamil • Karamel • The Kendal • Khazard warlord • King Roald • Me • Moss giant • Nazastarool • Nezikchened • Sand Snake • Skeleton Hellhound • Slagilith • Tanglefoot • Tree spirit • Treus Dayth • The Untouchable • Witch's experiment