Why Is My Chicken Sneezing?
An occasional sneeze is dust; repeated sneezing — especially with discharge, swelling, or more birds joining in — is the front edge of respiratory disease.
Most likely causes
Dust and ammonia
What points to it: Sneezes during bedding changes, in dusty runs, or in a coop that smells of ammonia at nose height; no discharge, birds otherwise bright.
What to do: Fix the air: more ventilation (above roost height, not drafts on birds), drier litter, less dusty bedding. Ammonia at levels YOU can smell is already irritating their airways.
Infectious respiratory disease
What points to it: Sneezing plus watery or bubbly eyes, nasal discharge, facial swelling, rattling breathing, or spread through the flock over days — mycoplasma (MG), infectious bronchitis, and coryza (foul facial smell) are the usual suspects.
What to do: Isolate symptomatic birds, support with warmth and hydration, and involve a vet — several of these respond to specific antibiotics, and a proper diagnosis (state lab or vet) matters because some make the flock lifelong carriers.
Something stuck
What points to it: Sudden violent sneezing/head shaking in one bird mid-forage — a seed hull or grass bit up the nostril.
What to do: Usually self-resolves; a visible obstruction in the nostril can be gently removed.
Check these first
Count and time the sneezes, check eyes and nostrils for discharge, smell the coop at bird height at night, and note whether it's one bird or several — spread pattern is the biggest tell between environment and infection.
When it's probably nothing
A sneeze or two after a dust bath or while demolishing a straw bale is chicken life. No discharge, no spread, no worry.
This guide is experienced-keeper guidance, not veterinary care. When a bird is crashing or a symptom is spreading, a poultry vet or your state extension lab is the right call — fast.
📄 Free printable: The Chicken Never List
The 15 foods that can hurt your flock, on one page — print it, tape it inside the feed-bin lid.
Harold knows your flock's history
Homestead Paradise keeps your flock's health records, lay records, and feed history — so when something looks off, Harold answers with your birds' actual story, not generic internet advice. Snap a photo with Harold's Eyes and log what you find, so next time you'll know what worked.
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