Ducks and Chickens eating Romaine Lettuce

I wanted to make sure they had a taste for the lettuce for the next time I try hanging it. I regret trying this after multiple rain storms while wearing sandals.

I kept having to stop recording because a rooster was attacking the duck that has problems with it's legs. It jumped on it's back and pecked it like when they mate I had to chase it away. I think it is just trying to bully the duck because it is injured.