I got some hatching eggs in from ebay and 3 of them are a bit smaller, brown, and spotted. Is there any chance that these are muscovy eggs or are they likely something else mixed in? Anyone know of any ducks that lay spotted eggs? They look similar to the ones in post #12 of the linked thread but slightly a lighter shade of brown.
https://www.backyardchickens.com/forum/viewtopic.php?pid=1913709#p1913709
https://www.backyardchickens.com/forum/viewtopic.php?pid=1913709#p1913709