I have 2 Mallard hens 1 year old, 1 Pekin hen 5 months old, and 2 Welsh Harlquins (1 drake and 1 hen, maybe 1 month old). This may get wordy and there is two parts to this. Please bare with me. Any words of advice are greatly appreciated. Part 1: Both of my mallards have been laying eggs for about 6 months now in the coop, nothing out of the ordinary. Every so often they lay one on the yard since we let them roam during the day. But just in the past 2 days one of them has decided that she is going to lay all of her eggs behind a wood pile in the corner of the yard. I couldn't find her for hours and thought a hawk got her. She still goes to the coop at night, but wants to sit on her eggs during the day and hisses and snaps at me if I get near her. (Very out of the norm for her). There is no chance her eggs are fertilized. Is this just natural instinct to sit on her eggs and protect them? But then to get up in the middle of the day and walk off randomly strikes me as odd. Should I just let her ride it out as long as she wants? Part 2: The other mallard with out the mommy issues is INCREDIBLY aggressive towards the 1 month old Welshies. She will do the whole head bob and if given the chance she will tackle and flog them. We keep them separated with cages and separate yard time like prisoners but its getting old. She was kind "rude" toward the Pekin when we brought her home but not nearly this bad. She has since gotten over any hate she had toward the Pekin (I think because the Pekin is 3x bigger than her). But with this being such a stronger aggression, will she grow out of this when the ducklings get bigger and can hold their own? Or will we have an all out brawl in our backyard? Thank you all so much for any help. This website has been a huge help in our first year of raising Ducks. I couldn't have done it without these forums.