sorry I never shipped birds before, I only know how to ship dartfrogs. But I guess it can't be too complicated. I would image you would have to have 2 boxes, the second box being a little smaller with air holes (pencil size) all around it. Put the 2 chicks, lite bedding, and a small very moist...
I would like to have them. I've been looking for cochin chicks, but you would have to ship it to me if you think its safe to do so, I'm in reno, nevada.