One of my Hens I noticed this morning has her vent stuck open!!! Looks like its shaped like an egg in there, its empty, alittle dribbly stuff kinda bloody at times drips out, but I did notice another hen try to peck at it. What is going on with the open vent?? will it close, what do I do?? Shes one of my only egg layers- shes about 3 yrs old.