Keen Senses. The voodoo chicken has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Magic Resistance. The voodoo chicken has advantage on saving throws against spells and other magical effects.

Patron Conduit of Loa. The voodoo chicken may act as a direct vocal conduit for warlock patron Loa. Those not blessed by Loa cannot hear patron speech unless permitted by Loa directly. 

Vicious Pecking. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 5(1d4 + 3) piercing damage. 

Cock Fight. Infected Claws. Melee Weapon Attack: +5 to hit, range 5 ft., one target. Hit: 5(1d4 + 3) piercing damage, and the target must succeed on a DC 10 Constitution saving throw or take 5 (2d4) poison damage and become poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Useless Chameleon. Voodoo Chicken may change feather color and pattern based on creatures' mood, surroundings, or weather events. Almost always useless and cannot controlled or used as camouflage. A nuisance really.