Hi, our duck eggs went into lockdown on Wednesday. They started externally pipping that night at around 6pm, but there wasn't a visible hole until the next morning. It's been 48 hours since they started pipping and this is how much progress they've made. I'm starting to get concerned as it's been two days now since they began externally pipping and these holes are all the progress they've made. They're still peeping at us and wriggling around, probably more so than they were before. Should I just continue to leave them be? At what point should we consider intervening?