I have an 8 month old Pekin duck. She has gone off her feed and is no longer standing up. She can't/won't stand up. She is still drinking water but is not eating. Her neck feathers look ruffled and the chickens started to pluck out her tail feather. She has also stopped laying eggs.The other night they must've been picking on her b/c she now has a bald spot on her lower back. I did take her out and have her confined by herself on shavings and put some water and a bit of food with oysters in for her. I also put some medication on her injury. I did give her a small amount of ivermectin yesterday as she may have parasites?? Is there anything else I could be doing for her. As of last night and today, she seems more alert and is "talking" a bit, but still not standing. What do you think?