Two nests - first time nesters (and I am a first time duck owner) One nest is laid with about 15 eggs with Miss Michael Second nest is laid about two weeks later, again with approximately 12-15 eggs by Miss Matty About two weeks ago, Matty and Michael switch nests and my third girl, Angel, sits with Matty on the first next. So - two girls are sitting on Michael's nest/eggs. Last week, 5 of Miss Michael's eggs hatched while Miss Matty was still sitting on the nest. Cuties! OK...Miss Michael immediately left her adopted nest to go over to the new babies and had a bit of a hassle with Miss Matty wanting to take the babies and sit on the nest again. Angel, Matty and Michael seemed to come to a resolution and all of them have been sitting on the nest and babies. NOW....this morning, Matty goes off the nest to drink and Michael takes after her - biting at her constantly - chasing her around and around the pen. At first, I thought maybe Michael was irritated that Matty was off the eggs and was trying to get her back on the nest. Matty normally hasn't gotten off the eggs but for a minute or two (just to get water/food) until today. Today she seemed to be off a bit longer. Michael chased Matty so much and it seemed so frantic that I opened the door and Michael chased her right out of the pen! When I put Matty back in a little while later (assuming Matty might need a break from sitting) - the behavior began again. When Matty would go to sit on the nest, Michael would leave her alone but then Matty would get back up and the whole thing would start again! When I turned around to get some water, Matty was nearly hanging herself trying to fly out over the low door - her neck hanging over the door while her wings were flapping frantically and Michael nipping at her from below! All this running around and around the pen - the females were stepping on the babies, tipping the food dish, feathers flying....a real tornado of activity! I let Matty out again. I tried again about 30 minutes later with similar results. This time, I put Michael out. When I looked in a few minutes later, both Angel and Matty were calmly sitting on the nest with the 5 babies sleeping on their backs. Angel has been a constant - sitting on the nest during the confrontations between Matty and Michael - nipping at Michael when she nipped at Matty. At least I was pleased the Angel was still taking care of the eggs. So - is this typical behavior for Muscovy ducks? What is happening? Should I leave one of the females out of the pen? There is at least two weeks left before the second batch of eggs will be ready to hatch. Thanks for any advice!