I left my soffits wide open. Ultimately cheaper and faster then covering them, only to make holes in them to then install venting.
If I had lower risk tolerance, I'd have covered them with hardware cloth but otherwise left them open. That is my general recommend as well. My goat shed has no...
for an alternate solution, look into Clerestory roof designs.
or Monitor roof designs where a large overhanging on the "upper" roof protects what is a glorified ridge vent on the short vertical.
Stepping in.
In places where you have potential for a roof covered in snow, a ridge vent becomes at times useless - snow blocks the vent. Additionally, even in places where snow isn't an issue (like mine), the size of the ridge vent forms a limit on the effectiveness of your soffit venting (my...
I will conceed that "hoop coops", which also rely on tarp roofing are fast to construct, light weight, and very effective - which is why the are so often used as mobile chicken tractors. Considering building one myself.
First. Make a bigger coop if you can. Preferably multiples of 4 or 8. Less cutting. What you spend in materials you save in time. Less waste, too. Abundance is a social lubricant - more space in a coop is never a problem. 5x6 is 30 sq foot less wall thickness. Good for maybe six birds...