If that’s a lash egg you really need to separate her. DONT eat any of her eggs. As soon as possible treachery for the infection and watch your other birds. So sorry hun.
1) Are you new to chickens / when did you first get chickens?
(2) How many chickens do you have right now?
(3) What breeds do you have?
I have Light Brahma, Silver Lace Wyandotte, RR Reds, Jersey Giants, Blue Cochin, EEGs, a couple Buff Orpington, and of course Silkies.
(4) What are your...