4 is a great number! I have that kennel and raised my pullets in it. It's really sturdy and solid - nicely done! Do you have a branch you can put in there so she has a roost? I put branches across the middle towards the back on different levels and my pullets enjoyed jumping from branch to branch. What are you feeding her?
Sounds like you're doing a great job!
Sounds like you're doing a great job!