I'm concerned my chick isn't growing properly. It is barely taking up 1/4rd of the egg. the air sack is quite visible and my husband says he can see it moving. I put the egg in on the 6th. Is it possible that the embryo didn't start growing immediately? could there be a delay in the growing? This is my first hatch and only 1 egg of 8 was actually fertilized - I need to talk to my rooster - and I'm nervous I'm not doing something correctly.