Okay good and i almost did that my first time candling to! It doesnt have to be exact, in fact 18 is the actual lockdown period. But i find 18 can be pushing it, candeling is helpful *mostly during incubation and not broody hens* because you want to get the rotten ones out ASAP. these will litterally explode in the incubator contaminating the other eggs! The first day you should see no activity, just blank. The next you should see little veins. But some are a bit later then others (very importantl some egg shells are much thicker then others, and harder to see, so if you see nothing it could still be active!) after that youll see a little ball in the center grow much bigger, and soon become black and dark, you can actually see its beak in there! The reason to not touch them during lockdown is because their pipping out, so your moving their position making them start over, and could be harmful to them. Evem if you did it on day 18 i think itd be fine, but id try not to Hope this makes sense!You’re not being confusing at all! The info is super helpful, especially the lock down period!
My dumb self would have been candling them until they hatched!
since I don’t know when exactly day 17 will be, I only dated 1 egg , 9/21, I’ll just stop candling on Oct 2nd. And as luck would have it, the one I dated is the one that I don’t think is viable…
all the eggs were laid when in 1-2 days on either side of the 9/21 egg…
also, if any eggs dont hatch by day 25 *just to be safe* definitely remove them. You dont want the mama using her time incubating a rotten/infertile egg!