Yes, I think if we incubate eggs again, we'll connect a thermostat so that we don't suffer any temperature spikes or dips!
Thanks so much for the links and duckling information. It's so great to be in contact with people who are so knowledgeable and share our enthusiasm! One thing we haven't done yet is find a source of niacin to add to the duckling's feed. We'll do this before they hatch in 5 days' time.
We'll definitely be back for more advice I'm sure! And we'll post a pic once our babies arrive.
GNC is a good source for Brewers yeast and plain niacin and on line[ Amazon ] Or Vitacost