clearly i'm new to ducks. we just got a little call duck (daisy) as a friend for our female welsh harlequin (lily). they are both adults, and the little call duck was SUPPOSED to be a female. she tried to mate with lily the first week or so here, haven't noticed it since. but now lily who lays eggs daily, has gone broody. is this timing coincidence or do ducks somehow "know" when eggs are fertilized. if not, is it normal for females to try to mate with others? we just have the 2 ducks. thanks for any advice.