Hi, I have 2 ducklings eggs that have made pretty big external pip holes about 2 days ago and since then they’ve not made much progress. they’re peeping like crazy and moving but the beaks are outside the shell. They’re very loud but sound as if they are in distress. The other eggs have pipped and hatch whilst they are still stuck in the same way. The membrane of one duckling looks very dark. I’m not sure when to step in and what to do if I do step in. I’ll attach photos below