Jus got big by the photo it I sent unzippered all the way around, correct? If so then I would say yes. The membrane might be dry where it can't break thru. Had this happen a few times with chicken eggs and had to help.
Hard to tell from the pic, but that doesn't look like a zip... ducklings tend to "punch around" a lot before zipping... you have a lot of condensation on your bator windows too, watch that your humidity doesn't get too high... it can cause edema and additional issues...