I have a pair of mallards and just recently got the female. I was told she was sitting on eggs when I got her but they didn't have a male so they weren't fertile. A couple of days after I got her, she layed 5 eggs but never would sit on them so I checked two and they were bth infertile so I took all of them out. Is it too late for her to lay more? It has been about 4 days now so I was thinking she was done and I have never seem them even try to mate. Both are definitly of age and are full grown. I had the male since he was a couple of weeks old but never had a hen for him.