While hens are generally considered tame animals, a menace to their eggs or chicks can turn them in very aggressive beings.
This is one putying a stop to a sparrowhawk's attempt to snatch one of her chicks.
\[source: buff.ly/3JZbKjl (https://buff.ly/3JZbKjl)\]
https://nitter.moomoo.me/Rainmaker1973/status/1674335614706020352#m