I don’t really know or care about WHY she crossed the road right now. That’s plot. That’s motivation. That's a different conversation.
What I really want to know is HOW the chicken crossed the road. Does she march with pomp and circumstance, holding a baton and humming ‘76 Trombones’? Or does she sneak on her belly, stealth like in dark colored parachute pants?
Showing how your character does a simple task tells us more about the character than if you tell us she’s a band leader or a ninja.
Writing prompt: Write a paragraph of how your character crosses the road without telling us who she is. Demonstrate an aspect of her personality by how she moves.