Wow, an 8x10 for 4 chickens?! Your girls must think they died and went to chicken heaven! But not to worry, I have a feeling you'll be getting more chicks - they're very addictive you know!
Very nice! What size is that shed? I want to build a 10 x 14 myself. I think you'll need more vents for cross ventilation or a couple of windows. Also, maybe a railing for that ladder!