i have a 2 year old duck named quacker. she started laying eggs since 2 years ago (2014) and then... one day. she layed an egg. but... SHE ATE THE EGG! and now she keeps doing that. but. Luckly there was no baby inside. if there was a baby. she would kill it! is this bad behaviors? she did not ate the egg when the first time she layed one! help!