It's almost like they are allergic to the fresh air. Inside the brooder with the screen top they're fine. But whenever I lift the lid and take them all out for a little run in my room. They all start to have sneezing fits, their noses will run, they'll itch their faces, and they'll fling their snot. This will last 10-15 minutes after I put them back in their brooder. After that they are perfectly fine. Eyes nice and clear. No sneezing. Are they used to their stinky chick poopoo air or something? Does fresh air irritate them? LOL!