I have an 18 month old Silver Laced Wyandotte who, when she lays an egg, her internal vent area (intestine?) protrudes about an inch & stays out 5-10 minutes after the egg is laid. Is this normal? Is this a heath issue I should be concerned about? If so, what can be done about it? I have only had chickens about 18 months & any help will be greatly appreciated. Thanks