Tom always large end up. If the chick develops properly the head is oriented in the large end this is where the air cell is and just before pipping it breaks the bubble. This is its first air to ever breathe as it has to have this to transform from breathing thru the blood vessels that carry o2 from the shell surface then at a point just before pipping as the yolk sac and blood is drawn in and the air is no longer pulled in thru the ie.(umbilical cord). It has to breath this bit of air then once this bit of air is breathed up the co2 levels in the egg and chicks bloodstream rise then this sets off a nervous tremor like activity and a instinctive desire to get to air(much the same as suffocation and the will to live takes over) the chicks that have the highest vigor and stamina from the get go will make it, the weak or otherwise not good performers are culled right here(why helping chicks out of eggs at hatch is not a good thing) This here is survival of the fittest/natural selection at its best, at work right from the start.OK , For the novice here . When we say "upright" referring to eggs does that mean large end up ?
I'd like to say I really enjoy this informative thread . Keep it rolling . Thanks Bob for starting it.
Jeff
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