Cold eggs

Yesterday morning morning i saw a ginnie on a nest. Later in the day, i went back and nobody on the 50 or so eggs. I went back before daylight and it appears that they were left alone all night at about 50 degrees. should i throw them away to keep from attracting coins?

excuse me, coons, not coins

Was a hen sitting the nest and she abandoned it?  Wow!  That's a LOT of eggs!

If it were me I'd bring them all in and candle each one.  Make the room dark or hide under a blanket and put a small flashlight to each egg.  If you can see a clear-ish egg with a single round dark shadow (yolk), it hasn't started developing.  If you see veins, if it looks yellow-ish throughout, if the contents look slushy, if the whole egg is very dark and you can't see through it, or if you see a small bean-like shadow, it's started developing.

If you have no male guineas then naturally they wouldn't be fertilized and none of that is relevant.  If you want to try eating them, you can float them all in a pot of water.  The freshest will sink firmly.  Any that float to the top are questionable but not guaranteed rotten.  Any half-floaters can be questioned as well.  Just crack these over a bowl of their own to inspect before use.  

Eggs float in water when their bloom as broken down.  The bloom protects the contents within the shell from exchanging oxygen with the outside air.  As the bloom degrades, whether that's over 1-2 weeks or it was wetted and the bloom got washed away, oxygen begins exchanging through the shell, increasing the air pocket within the egg as the egg begins to lose moisture.  This makes the egg prone to bacterial infection and decay.  A floater isn't always bad- an old egg can be dehydrated inside without having gone rotten!  Likewise a semi-floater could be rotten already, depending on what bacterias have started growing already.

I always save big nests of eggs and keep the good eggs, feed the bad eggs to the dogs or pigs.  Lots of free food right there!

Thanks for great info Jen

Yes, thanks Jen very much!  I had always wondered about the old "float an egg" test.  I'd never heard it laid out in as much detail before, and I'd noticed that a lot of eggs that at least sorta float seemed still to be good, so I had wondered if that test was valid.

Always convenient to have pigs on your property!  The ultimate garbage recyclers.  Pigs or black soldier fly larvae.  Turn any unusable or undesirable food matter back into good usable protein and fat.