Don't count your chickens until they are hatched.
Some eggs have double yolks , so you can't really count eggs and chickens
You can't walk around the hen house to count the eggs because it will disturb the hens and they won't lay eggs.
Since eggs break so easily , you may not be accurate in your count of future chickens
It is not really sensible to rely on something that has not yet happened and may not ever happen