Can different size breeds live together happily?

Maybe it is a silly question. I had 3 Muscovies, but 2 were eaten by a predator. The third was attacked at the same time, but flew away and come home later that night with minor neck injuries. She is healed up and her neck feathers are growing back in. I can tell she is lonely even though she hangs with the chickens now. I'm desperate for any duck at this point, so do you think a small breed duck would work as a friend or should I get a similar sized duck? I've looked on Craigslist, but no one has gotten back in touch with me. I could drive 3 hours to Maine, but I'm hoping to find something closer.