Most everything looks great, I can tell you want it to last and your chickens be secure. Are the 2x4s in the trusses treated as well as the posts? The only thing I would have done different would to have put the top plate on top of the post, instead of in between them, and lapped the corners like in houses constriction. That's a Lot of Weight up there to only be supported by a couple of jack scabs/ledger scabs (not jack studs because they don't reach floor). It's just me but I would put some 1/2" x 6" or 8" bolts thru those scabs. I wouldn't trust 16d nails to hold that roof up long term. Other than that it looks like a great job. You should be proud of yourself.