Help me identify my babies please

[MandylouNbrian]

For the life of me o cannot identity what breed of duck 2 of these are. I know the large crested is likely a crested Peking, and I have 2 Rouens… the smaller crested that’s yellow and gray and the yellow with darker back have me stumped! Any thoughts?

 

[SilverBirds]

The duckling without a crest is either a Silver Appleyard or Welsh Harlequin. I'm leaning the first. The crested one may be a Buff Orpington. It will be easier to tell once it feathers out more.