Bird egg binding: symptoms and emergency care

Egg binding — where a female bird is unable to pass a formed egg — is one of the most common avian emergencies. It can kill a small bird within hours if not treated. Every owner of a female bird should be able to recognise the signs.

What is egg binding?

A bird is "egg-bound" when a fully or partially formed egg becomes stuck in the oviduct and cannot be passed normally. The egg may be retained because:
- It is abnormally large, misshapen, or soft-shelled (common with calcium deficiency)
- The oviduct muscles are weak (from poor nutrition, obesity, or repeated egg laying)
- The bird is cold, stressed, or dehydrated
- The egg is in an abnormal position

Which birds are most at risk?

- Budgies (budgerigars) — the most commonly affected species in captivity; they lay frequently and are prone to chronic egg laying
- Cockatiels — also prone to chronic laying and egg binding
- Lovebirds, finches, canaries
- Any hen (female bird) without a mate — stimulated to lay by light, other birds, or hormonal cycles even without male contact

Recognising egg binding — act immediately

A hen that is egg-bound will show some or all of:
- Straining — visible abdominal contractions, tail pumping up and down
- Sitting on the cage floor or at the bottom of the cage (a very serious sign in any bird)
- Fluffed feathers and obvious lethargy
- Loss of balance or inability to perch
- Laboured or open-mouth breathing — the egg presses on the air sacs
- Tail bob — visible movement of the tail with each breath
- Distended, hard abdomen — sometimes visible, sometimes palpable

Immediate first aid while getting to a vet

1. Keep the bird warm — place in a warm environment (32–35°C / 90–95°F) using a hospital cage or placing a heating pad under half the carrier. Warmth relaxes smooth muscle and can help.
2. Increase humidity if possible — steam from a warm bathroom can help hydrate the oviduct.
3. Ensure hydration — offer water.
4. Do NOT try to manually press or massage the egg out — you can rupture the oviduct, which is fatal.
5. Get to an avian vet immediately.

Veterinary treatment

- Calcium injection (relaxes the oviduct) + oxytocin or prostaglandin (stimulates contractions) — often resolves within 1–2 hours
- If medical treatment fails: aspiration of the egg contents followed by egg collapse (oxysynthesis), or surgery in severe cases
- Supportive care: fluid therapy, warmth, nutritional support