My 9 remaining duck eggs are all developing nice and the embryos are moving around so I know they are all alive, but some of the air sacks are very small compared to others and have not grown. They are now on day16 for most and look good to me accept the air sacks. I started with what I considered low humidity (30-36%) and have gradually been raising it over the past few day to the mid 40s. The temp is fairly constant between 99-100. Is a small air sack something I should worry over? This is my first time incubating ducks eggs and when my family used to incubate chickens we never candled. I'm not a totally newbie just new to aspect lol
Thanks
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