I have a broody White Rock hen sitting on a variety of 5 duck eggs. She has been on them now for 14 days. I candled them at day 8 and saw veins so all seems to be going well. Should I do anything about the humidity issue? I figure mother nature always knows best, but she is a chicken, what will she know about duck eggs? I know plenty of hens have been used to hatch eggs other than their own, including duck eggs. I just never gave the humidity issue a thought before. What do you think?