Hi there. My mother and I are looking after eight orphan Mallard ducklings until they can be released into the wild and health wise they are going really well. HOWEVER, one duckling has only been using one leg for the past 3 days. Now we know why We have just discovered a tiny price of string wrapped around his leg just above where his foot begins. We just tried to remove it but he has grown so much that it is embedded to far into his skin. We are really worried about him possibly losing it. Any ideas on how to remove it???