Technically that wolf could be starving to death and the stork could have came and started pecking it unprovoked.

The goose was probably mean to it when it ate its brother or something.

It Is a both sides situation, except the both sides are the wolf and the human. Both want to eat the bird - the human is just waiting for dinner time.

Which is true, honestly. The wolf needs to eat to live, and the duck/hen needs not to be eaten to live.