A chicken shaking her head repeatedly is trying to dislodge something that’s irritating her, whether that’s a parasite, an infection, or something stuck near her ear. Occasional head shaking is normal grooming behavior, but persistent or frequent shaking points to a problem that needs attention. The most common causes are ear infections, external parasites, and gapeworms, each with distinct accompanying signs that help you narrow it down.
Ear Infections
Ear infections are one of the most common reasons chickens shake their heads. A chicken’s ears sit behind small feathered openings on each side of the head, and when bacteria get inside, the irritation drives repeated head shaking and scratching. Outer ear infections cause visible signs you can spot: crusty discharge over the ear opening, matted feathers around the area, and redness or swelling. Your chicken may also yawn excessively, which is her way of trying to relieve pressure in the ear canal.
Middle and inner ear infections are more serious. When infection reaches the inner ear, it affects balance and coordination because the inner ear controls spatial orientation, just like in humans. This is when you’ll see a head tilt, where the chicken holds her head at a persistent angle to one side, along with stumbling or walking in circles. In severe cases, the neck can twist dramatically into a position called wry neck (torticollis), where the head bends backward or sideways and the bird can’t hold it upright on her own.
To check your chicken’s ears, gently hold her close to your body with her wings secured against her sides, and retract the small feathers covering each ear opening. Look for redness, swelling, or any crusty or wet discharge. Compare both sides for symmetry. A healthy ear canal has clean, smooth skin inside. If you see discharge, swelling, or smell anything foul, a veterinarian can prescribe appropriate treatment.
External Parasites
Lice and mites that settle near the head and face cause intense irritation that makes chickens shake their heads, scratch at their faces, and rub their heads against surfaces. These parasites are small but visible if you know where to look.
Lice are straw-colored, wingless insects between 1 and 6 mm long with flattened, elongated bodies. They attach their eggs (called nits) directly to feather shafts, either in clusters near the base of the feather or individually along the shaft. You can spot them by parting the feathers around the head, under the wings, and near the vent area.
Northern fowl mites are red to black and, unlike some mite species that only come out at night, are present on the bird during the daytime. They lay white or off-white eggs in bundles on the fluffy part of feather shafts. On breeds with beards or crests, mites often concentrate in those head feathers, which directly explains the head shaking. A heavy mite infestation looks like dark, pepper-like debris clustered at the base of feathers.
A related mite burrows into the unfeathered, scaled skin of a chicken’s feet and legs, and occasionally around the beak and nostrils. If your chicken is shaking her head and you also notice a brittle, flaky, powdery appearance to her legs or crusty buildup around her nostrils, this burrowing mite could be involved.
Gapeworms
Gapeworms are parasitic worms that live inside the trachea (windpipe). Multiple worms attached to the airway lining partially or completely block airflow, and the chicken shakes her head trying to clear the obstruction. The hallmark behavior is “gaping”: stretching the neck out and opening the mouth wide while gasping for air. You may also hear a grunting sound or see coughing alongside the head shaking.
Chickens pick up gapeworms by eating earthworms, slugs, or snails that carry the larvae. If your chicken is shaking her head and also gaping, breathing with her mouth open, or making unusual sounds when she breathes, gapeworms are a strong possibility. A vet can confirm the diagnosis with a fecal test, and standard poultry dewormers are effective against them.
Nutritional Deficiencies
Wry neck isn’t a disease on its own. It’s a symptom with many possible causes, and one of the most treatable is a deficiency in vitamin E or thiamine (vitamin B1). These nutrients are essential for normal nerve and muscle function, and without enough of them, a chicken loses the ability to control her head and neck properly. Early stages can look like simple head shaking or a wobble before progressing to a full twist of the neck.
This is more common in young chicks and in flocks fed old or improperly stored feed, since vitamin E degrades over time. Selenium works alongside vitamin E in the body, so deficiencies in both often occur together. Supplementing vitamin E orally can reverse the condition if caught early, and many poultry keepers keep vitamin E capsules on hand for this reason. Switching to fresh, high-quality feed and adding foods naturally rich in vitamin E (sunflower seeds, spinach, broccoli) helps prevent recurrence.
How to Figure Out the Cause
Since several very different problems produce the same head-shaking behavior, the accompanying signs are what tell you which one you’re dealing with. A quick checklist:
- Head shaking with ear discharge or matted feathers near the ear: likely an ear infection.
- Head shaking with visible tiny insects or eggs on feathers: lice or mites.
- Head shaking with mouth gaping and labored breathing: gapeworms.
- Head shaking progressing to a twisted or tilted neck: wry neck from infection, nutritional deficiency, or a neurological cause.
- Head shaking with no other symptoms, happening only occasionally: normal behavior, possibly just dust, water, or a loose feather near the ear.
To safely examine your chicken, hold her close to your body with both hands, keeping her wings gently pressed against her sides. Never hold a chicken upside down by the legs, as this can cause injury, aspiration, and severe stress. Covering her head loosely with a towel can calm her during the exam. Part the feathers around each ear, check the skin on her face and crest for parasites, and watch her breathing pattern for any gaping or open-mouth breathing.
If the head shaking is persistent, worsening, or paired with any of the more concerning signs listed above, acting quickly matters. Ear infections can spread deeper, parasite loads grow over time, and nutritional deficiencies cause progressive nerve damage that becomes harder to reverse the longer it goes untreated.