Yeah they look like that and some look like Rouen. From my understanding if you are wanting to breed the ones that start out looking like Rouen you shouldn't be breeding. Our golden 300s were like brown, one was more yellowish with a black stripe on her head, which we named Stripe lol, and the...
You can eliminate it being a mallard if it is missing a toe on one of the legs. As far as I know all the hatcheries in the US clip one if they hatch mallards. Then you will have to wait til it feathers out to know which of the other 2 it is. We had a silver appleyard when we thought it was a...
I would add the black one could be a silver appleyard as well. I have not seen a duckling that looks like the other at all. The markings do look like those 3 breeds, but haven't seen any other than black, with those markings. You might could see if the TSC will tell you who they got them...