I kept my ducks in the pen today since we were getting 4-8 inches of snow and my drake beat up one of my 4 females. Under normal circumstances they free range all day and only spend the night in the pen. She has many flight feathers pulled out with some bleeding (very little) along with the back of her neck matted and picked at. This winter has been record setting in the Philadelphia area with more 6+ inch snow storms than ever. We have an ice storm coming tomorrow night and more snow this weekend. I have kept them in for a day or two for the other snow storms without incident. Do you think this is because they were kept in the pen or something else going on that won't be resolved when I let them range tomorrow? She will be separated form the flock tonight but I hope to reunite them tomorrow. Here she is getting a warm bath.