My hen has been sitting on 3 eggs and all were moving at day 16 candling, today (day 19 or 20) i went out to find that another hen has decided to lay in her nest box and broken the egg at the bottom (just broken into the air sac), there was a tiny bit of blood under the shell. I stopped the bleeding with flour but should i throw this egg out now? does bleeding mean certain death? I've blocked her nestbox off from the others now but is that too little too late for chicky?!