It's an old story in duck-keeper land. Duck mom goes to feed store to buy oyster shell. Duck mom looks at the birds in the brooder next to the oyster shell. Duck mom sees ducklings on sale for $2.50. Duck mom has 2 duckies the same age already in the brooder at home. Duck mom picks out 4 more duckies. So I selected from the peeping masses; 2 Blue swedish (I love blues! these guys had cute spots of dark blue on blue fuzz!), 1 black swedish, and 1 that I thought may be a rouen because Hubby liked the stripes. They were all hatchery choice and came from an undisclosed New Mexico Hatchery that was *not* Privett (they were VERY clear on that, I gather there's some bad blood at that feed store.) I can't seem to rule out either mallard or rouen from this 6 week old+ duckling, but I suspect mallard. If she were a Rouen, she would have to be a runty one. She's smaller than my Harlequin ducklings of the same age and her legs seem thinnest out of the lot, so I suspect she may be bred to be top heavy (and a flyer.) A runty rouen is still possible I suppose, I've kind of written off that I won't know for sure unless I see her fly in earnest. Anyone have any other ideas I could apply to try to determine? I'm going to clip her wing when she grows out feathers before she gets the chance to try flying.