Same! This happens to me once, then I got two more to be company for my remaining duck. But then the remaining ducks and one of my new ones was killed and I had one all over again. A month later she passed too (predators) so I decided not to get ducks again for a while. Well here I am 2 years...
Muscovies are no good for new duck owners. Pekins are prone to a crap ton if health issues and not something they will want to take on. Swedish would be my best recommendation. They are friendly like Pekins, but much more colorful and easier to care for health wise.