Excellent job so far.
Why aren't you at least setting it on pier blocks? One on each corner, one in the middle of each span. 8 in total, $80 max, and it will elevate your coop off of the ground (one corner is touching, but it looks like you have a PTGT block there), and I can see that you are putting a lot of time and effort into your project. Carpentry looks very well planned out. The foundation is the most important part of every structure. I'd suggest doing that now before you get too much weight to jack up.