No, I haven't yet. Hopefully will see the neighbor this afternoon (I texted with her yesterday, but don't plan on asking her through text about eggs, I love my neighbor but I'm nervous about how she's going to respond even though she said I could have the eggs). I'm thinking once the duckling is big enough about putting him or her in with the chickens. Not sure yet. I haven't seen anything advising against it. I might build a little house for him or her, but whatever I do I have to protect him or her from my dog (I'm not sure how I'd go about it if I had to keep the duck separate from the chickens because I used most of the chicken wire on the chickens and chicken wire wasn't cheap). My dog is a hunting breed, and she goes after cats, squirrels, birds, and when we tried to introduce her (with STRICT supervision) to the chickens she tried to bite their heads off (more than once). Not a playful/motherly grab either. So the only thing she's allowed to do is go outside and patrol the yard for predators, she has no access to the chickens!
The only thing I can think of is her dogs might have knocked some of them around before I gathered them. Her ducks free roam within the fence, and the female just lays them wherever. The dogs free roam where their collar allows them (which is pretty much the whole back yard), so the eggs really aren't safe from their reach (which is why I had suggested them making a nesting box, I even told them a cheap idea, but I'm not going to push the issue). The duck seems to like to lay the eggs mostly around the deck area, but laid a few of the ones I found near the kids' play set.
On a funny note, the male duck bit my dog's side of her face the other day. It wasn't really funny that she got bit, but it was funny how it happened. She was standing near the fence minding her own business. Normally she barks at/tries to run the fence with the ducks. The male reached through the fence and all of a sudden just bites her. I was like what in the world. She wasn't even doing anything lol. Now she stands farther back from the fence and if she sees the male duck backs up rather than charges toward to run with. I did catch her one day trying to kiss the duck too lol