As soon as I let the new goats out of the truck, our other two goats came over to investigate. Almost immediately the new, larger female started trying to dominate the two sisters. And then along came our elderly ewe, who quickly set the goats straight about who's really in charge here.
It will probably take a while before the newcomers fully integrate themselves into the flock. They spent last night sleeping on the deck, rather than in the barn with the others. The temperatures overnight were quite mild, though it rained during the night, but there's a table on the deck which they could shelter under.