I bought 6 ducklings that were supposed to be muscovies. Now that they are feathering out, I seem to think they are something else! All 6 of them are black with white bibs (I seem to think they are swedish ducks). They don't have the large bean, big tails, or the large oil gland at the base of their tails like my other muscovies. Also, I can't seem to find any muscovies that are all black with white bibs like this! Anyone have any thoughts?