@shawluvsbirds has Calls. @WVduckchick has Calls. @casportpony has Calls
The only thing I know about them is they are precious and can be hard to harch without intervention from us becasue of their short bills.
If you read this and look at the ducklings that came from Pekins drake and duck I'd say Pekins hide other colors under that white.
https://www.backyardchickens.com/threads/black-pekins.1153731/
I think @New duck mommy 2021 has a KC drake and Pekin female She has many pictures off off spring. But a Blue Swedish drake over these ducks I can't recall seeing.
@Moments has Blue Swedish not sure if she has any drakes though.
sorry I am not any help :hmm