It's too dark in there! Add windows and more ventilation. With a roof over the entire structure, you can have hardware cloth over a very large opening on the run side, at least.
Mary
Welcome! I do have some ideas here; your structure is very nice!
Having a solid roof is the best, for shade, and protection. Wide roof overhangs are better, can you still add them? More shade in summer, and weather protection.
Lots of ventilation is really Important, so having a big hardware...