Ok, so we asked for two female mallard ducklings. The store owner was rude and not very informative when we asked what we needed, and even recommended medicated feed. Now, at about 5 1/2 weeks, I'm wondering if they gave us mallards or rouens. Mostly based on their plumage and size. any one have an idea of the breed? We love them to death, and wouldn't change them for anything.