No they are not herbivores. Chickens are Omnivores. They actively pursue bugs and eat meat when it is provided or found. Turn over a log or piece of wood and see how they react when they see worms....
No Chickens are omnivores All chickens eat meat when available. Bugs, Worms, mice and each other sometimes. Every farmer has had the misfortune of losing day old chicks to the more aggressive members...