I just went out to collect eggs for the day. I found two in the nesting boxes, and for some reason I looked up to their roost and seen somethng that looked like an egg. I reached up and gently grabbed it and its a very, very, very soft egd with a slit in it... I provide oyster shells and grit to my chickens, but yet this egg is extremely soft? Is it something else? All my other eggs have not been soft at all. Even the first eggs they laid.