Oh good. They directed me back here! Hello.
Right, Proper Muscovies, as far as I understand came originally from S.America. Their eggs take 5 weeks (35 days) to hatch. Most European ( and thus USA) ducks come from Mallard/Pintail etc 28-30 days hatch. (aylesbury, khaki campbell)....
Different genetic pool!
They will mate and if you can get the eggs to hatch you get big birds, but they tend to be sterile. Same as a mule (or Hinny). You get the odd one who is fertile, but the F2 generation? Who knows?
One of the things that I have found is that although a Muscovy LOVES all babies, even v.small kittens and rats! LOL
She does not speak the same language, or eat the same food. Muscovies are insectivores! mallard derived, dabble for food., It is almost as bad as giving quackie duck babies to a hen.
So, my advice is get your quackie duck (boy the Rouen) some decent sized girls who QUACK. Get you LADIES a male who sounds like a steam train and looks like a falt bed trailer and DO NOT BE SUPRISED when they FLY!
All the best