egg safety

that or you hear a chirping sound from them

Dates on eggs are usually 7 days prior to their actual 'use by date', although for safety reasons, the 'real' use by date is never published.

This is primarily because you don't know the conditions in which the eggs have been kept. For example:

If a shop keeps the eggs in a chilled cabinet & you buy them & keep them in the fridge, you should get the +7 days. If however, you buy them from chill & keep them in the open, you'll be lucky to get +3 days. Change in temp will knacker the eggs life date. There's legislation currently being touted to make shops keep eggs in chill, but its being resisted as many shoppers dont refrigerate their eggs.

Eggs kept in the open in shops will generally hav a +3 or +4 date at home no matter what conditions you keep them in.

It's reasonably safe, altough not very scientific.:dunno:

sometimes large eggs from older laying hens can have a larger mass of air to yolk ratio so a good egg will float - Also, the shells on some eggs deteriorate, so water permeates them & a very bad egg will sink - although you'd notice the bubbles & feel the egg full of water I guess !!