Both apple yards and 300s have the mohawk.. The only way to tell them apart is by the color of their legs, 300s will have all black legs meanwhile appleyards should have yellow/orange with a little bit of black on them.
And the bill on an Appleyard should be orange. Some other threads in this forum have had similar questions about such mystery ducklings, and they turned out to be golden 300s.
Also, since it came up, I'll add that eye stripes on an Appleyard duckling are not in line with the American Poultry Standard, so don't breed for those traits.


