When do you throw out *clears*? And when is the *latest* you have candled and seen development?

[FruitfulFaith]

I'm fairly new to incubating still but I'm learning So I candled a bunch off Orpingtons and Sizzles today and found a few that were still clear on day 7. I'm wondering when everyone else tosses out clears? I just HATE the idea of throwing out an egg that still has even a remote chance.
When is the *latest* that you have seen a clear egg start to develop? I had two ducks recently, and one did not show ANY development until about four days after the other... it didn't hatch after all that, but it did develop all the way. So at what point is it a lost cause?

 

[LaPetiteFarmer]

I usually throw the clear ones at day 10.

 

[FruitfulFaith]

Anyone else want to weight in? I know this isn't an "exciting thread" that says "HELP HELP MY EGGS ARE HATCHING PLEASE HELP"

 

[blueegggirl]

Day 7 -10 I throw out clears-- if the egg is really growing right - day 4-5 the blood vessels are so obvioud

 

[ozexpat]

Anyone else want to weight in? I know this isn't an "exciting thread" that says "HELP HELP MY EGGS ARE HATCHING PLEASE HELP"

in my experience eggs from the same breed from the same supplier all develop together. there are not normally growth spurts.. with a good LED flashlight any egg on day seven that lights up like a lava lamp without lava is a dud. i keep marans and olive eggs for 10 days as its harder to see.