Drool and head tossing

[ChickChick2121]

My hen is doing some stuff I'm concerned about. This morning she flew to a roost in the run and kind of missed and flew off the other side. Which I've seen before because sometimes they're clumsy. But when she said/flapped off she had a clear drool-like stuff coming out of her mouth. The. She keeps shaking/throwing her head forward or to the side. I only saw the drool once and not again but the head tossing is still there. She's still doing normal chicken things like preening and going after food. Not sure what it could be.

 

[azygous]

A crop disorder. Read about them here. https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/