thick membrane normal?

[jimma207]

I just candled a 6 days. 13 of 15 have veins. Of the 2 that were duds, one had a displaced air cell. I opened it up and sure enough it was scrambled(yes the eggs were shipped). Although I noticed the membrane was very thick and almost stayed in tact when the egg was opened. Is this normal? I just calabrated my humidity gauge and it was off by 10. thinking I was at 45-50. Ive been at 60%. could this be the cause? should I drop the humidity even lower? I am currently corrected at 48% humidity. thanks for helping.

 

[Imp]

Quote:
I don't know about the hatching question, but backyard eggs do have thicker tougher membranes.

Imp