hi, I hope you are all fine!
I joined this forum last year, I had presented in this thread at the time, but I haven't written here since! I read in another thread that bdutch is going to hatch with a broody (so am I)... I came here to keep up to date, haha!
as a first time hatcher I'm totally new to this, but here is my experience with pencils:
since I wasn't sure my broody was really committed, I let her sitting on unfertile eggs for a couple of days, then I added 10 fertile eggs marked with pencil and removed the old ones... except one, because the hen was getting nervous.
fertile eggs were all marked, so I thought I'd be able to remove the last unfertile egg in another moment. on the next day the hen stood up to eat something and to my disappointment I saw that all the pencil signs were gone. I guess that the hen erased them by rubbing! no big deal, she will seat on 11 eggs, but