swollen ear

My 5 y/o BO has a swollen ear that I inly noticed today. I don't see any wound or site where there might be a core infection, but it's swollen for sure. No other symptoms (no drainage, energetic, eating, drinking, etc.). Should I get her on abx? Wait and see? It was really hard for me to get a...

This is one of our leghorns. See attached photo. I was told this could be an ear infection? How do I help our hen? She is acting normal and unbothered. We want to address this before it gets worse, and to know how to prevent it in the future. If you’re familiar with this, any guidance would be...