I have 4 barnyard ducks. I have raised them from ducklings. I bought them at a chicken sale & I was wondering now that they are grown, what breed are they? Three of them were yellow & grey spotted when they were ducklings and now have turned white & grey and have a little red on their beaks. The other was a tiny solid yellow duckling which is now a light yellow / white & the others try to run it off. None of the ducks have curled tails. They all sound about the same to me. I don't know how to sex them. Help!?!?!?