They changed a little but they both had a little bit of marbled feet and they became more spotted and the bills became more spotted too. it depends do. So to answer your question they stay spotted but change in patterns.
I had them since they were 3 days old and they have learned to trust me. I handle them a lot and give them lots of attention. they love perching on my shoulders.
I am proud to say my ducks have made it BIG!!! We are on National Geographic's!! Maggy and Reina where the stars! My faun and white runner duck and my Magpie! <3 to read the article go to http://proof.nationalgeographic.com/2014/03/05/musings-holly-wilmeths-divine-nature/