OMG! I'm so excited.. My first call duck eggs! Had 4 this morning!(pic only shows 3..we cracked 1 open) My daughter literally checked yesterday and nothing. Can they actually lay 4 eggs overnight?(dumb question, I'm sure) We are new to call ducks and literally just picked them up last month (Grubbs Waterfowl stock) The shells are too thin so I need to add more oyster shells to their feed.