What egg binding means inside the hen
Egg binding is exactly what it sounds like: a fully or nearly formed egg that has reached the end of the laying tract and will not come out. Sometimes the egg is simply too large or awkwardly shaped; sometimes the shell is soft and rubbery and gives the muscles nothing firm to push against; sometimes the hen herself is the problem — a very young layer whose tract is still maturing, an older bird, or one whose muscles are weak from poor condition or a long illness. Whatever the cause, the stuck egg presses on nerves, blood vessels and the passage droppings use, so a hen who is egg-bound is not merely delayed. She is obstructed, and obstruction in a bird this small becomes life-threatening over hours rather than days.
The signs, in the order owners usually notice them
The first sign is effort without result: the hen keeps going to the nest box, settles, strains and leaves with nothing laid, or squats in the run pushing repeatedly. Her tail pumps up and down with the straining, and she may make small, distressed sounds. As it goes on her posture changes into the classic penguin stance — body tipped upright, tail pointing down, waddling rather than walking — because the egg low in her abdomen is shifting her balance. She stops eating and drinking, sits fluffed with her eyes half closing, and her droppings dwindle to small amounts or stop, sometimes with watery discharge around the vent. If you pick her up very gently you may feel a hard oval shape low between her legs, but feeling for it is the limit of home examination: never press, massage or squeeze her abdomen trying to move the egg along.
What you can safely do at home
Home care for an egg-bound hen is about support and time-buying, not cure. Move her into a warm, dark, quiet box away from the flock — warmth helps her muscles work, darkness settles her, and separation keeps the others from bothering her and lets you watch exactly what she passes. Put water within reach and let her drink if she wants to; do not try to syringe fluids into her beak. Some hens pass the egg with warmth and quiet within a few hours, and if yours does, keep her resting until she is bright, eating and passing normal droppings before she rejoins the flock. But treat the home box as a waiting room, not a treatment: if she has not laid within a few hours, if she is weakening, straining continuously or has any tissue showing at the vent, she goes to a vet that day — sooner if she is deteriorating.
What never to attempt, and why the vet matters
The internet is full of confident home remedies for egg binding, and most of them injure hens. Do not try to pull the egg out, hook it, break it deliberately, or insert oils or instruments into the vent: a shell broken inside the tract leaves sharp fragments and egg material that drive severe infection, and rough handling can tear tissue that a vet could have saved. A vet can confirm the egg's position, support the hen with fluids and warmth, and remove the egg safely if it will not pass — treatment that simply is not available at the kitchen table. Afterwards, watch her closely for the next egg, and keep a timed note of every sign and of each step you took; that written sequence gives the vet a clean account instead of a worried summary from memory. If a question arises while you watch her, put a follow-up question to KinsLe's Kimmy; she answers using the KinsLe Answers library.