There are many choices for windbreaks, but I personally like Eastern Red Cedar, see the pic below. It grows really dense almost ground to top and is of course evergreen. The pic is from a site I hadn't come across before,
Windbreak Trees. It seems like a really useful site regarding how to design and plant etc., and of course, they're glad to
sell you the trees. White pine is on their species list too!
Anyway, back to the cedar, I might plant a double or triple row with an eye to progressively logging as they grow for the lovely rot-resistant
wood, very handy for all kinds of things on the farm. Windbreaks are more effective if they're not just a vertical wall, I might plant some dense, low bush or shrub at the base of the windward side and also the leeward side of your cedars.
If your prevailing wind is from the southwest, then, I'd plant maybe some berries on the sun-facing side, and a shade-loving bush if you can find something appropriate, on the NE side. Planting something at the base of the windward side is more important to sculpt your windbreak than the leeward side, but both are helpful.
In addition to the Windbreak Trees website I just came across, the
Plants for a Future website is really great to search for plants with specific characteristics you might need on a
permie property, it's great for stacking functions and idea generation.
Good luck to you and your chooks!