I have 4 ducks 2 male mallards and 1 white crested and 1 white layer female had them since they were babies great ducks get along never fight..About 7 months old..Just got 2 new ducks 2 days ago 2 female mallards one 7 months one 1 1/2 years..My males are trying to mate them to death...They are going insane! The 2 new ducks have had the feathers pulled out of the neck the boys are tying to drag them around I think they are going to drown them in the water..I have them apart so the males cant get to them but can still see all 4 females..What do I do? They never acted like that with the 2 other females they mate all the time..Never pulled feathers or ever hurt them..Why are they acting like this...Please,Please someone help!!