Shipped eggs are the harderst to hatch. I bought eggs from reputable BYC'ers hote for goode hatch rates and I ony hatched 5 chicks out of about 25 eggs. I was upset too at the time even though I knew this was possible.
I check the development of the air cell during the incubation to verify that the humidity level I'm using is right and I do dry hatch methods: THe RH varies, sometimes a lot. My goal is 30-35%, but Like I said it fluctuates so the air cell development is key. Let me find the links for you.
ChooksChick's Incubation Cheat-Sheet ROCKS!!!
How To Incubate & Hatch Eggs Using The "Dry Incubation" Method - BackYard Chickens Community
Diagrams of air cells, duck and chicken:
http://www.poultryconnection.com/quackers/aircell.html
I check the development of the air cell during the incubation to verify that the humidity level I'm using is right and I do dry hatch methods: THe RH varies, sometimes a lot. My goal is 30-35%, but Like I said it fluctuates so the air cell development is key. Let me find the links for you.
ChooksChick's Incubation Cheat-Sheet ROCKS!!!
How To Incubate & Hatch Eggs Using The "Dry Incubation" Method - BackYard Chickens Community
Diagrams of air cells, duck and chicken:
http://www.poultryconnection.com/quackers/aircell.html