Strong winds and a sharp drop in temperature are bringing a cold wave! For poultry farming, focus on cold, dryness, and drafts to protect respiratory health and get through the winter safely
A bout of strong winds and falling temperatures presents a challenge for a flock. At this time of year, many poultry farmers face one respiratory problem after another: colds, nasal discharge, and coughing. Many focus only on “raising the temperature to keep the birds warm,” but overlook the three key causes in cold-wave conditions: cold, dryness, and drafts. Missteps in management can lead to losses.
To get through the season of falling temperatures smoothly, first understand the underlying causes of illness so you can manage the flock effectively.
First, the first key factor: cold. It damages the respiratory tract’s first line of defense. A chicken’s trachea is lined with cilia, the respiratory tract’s most important “protective brush,” which clears away inhaled dust and pathogens. When the temperature inside the poultry house drops suddenly and the birds get chilled, cilia movement slows considerably and may even stop briefly. It is much like how a person’s nose gets congested and resistance drops after getting chilled. Viruses and bacteria that would normally be kept out are no longer blocked by the cilia and attach directly to the tracheal mucosa, where they multiply rapidly. This is the underlying reason respiratory problems and colds can break out in flocks after temperatures fall.
The second key point: dryness. Dry, cracked and damaged mucosal barriers. Winter air is already low in humidity, and when the poultry house is sealed for heat retention and heated with warm air, the indoor environment becomes even drier. The respiratory mucosa of chickens needs suitable humidity to stay moist and intact. When the environment is too dry, the mucosa loses moisture and cracks, creating direct breaks in the protective barrier. Pathogens enter the body through these breaks, multiplying the likelihood of illness. Many farmers know only to retain heat and overlook humidity, making recurring respiratory problems difficult to resolve completely.
The third key point: drafts, especially direct cold drafts, are the biggest hidden killer. Many people cannot distinguish between “proper ventilation” and “draft exposure.” In windy weather, cold air entering through gaps, vents, and door cracks can blow straight at the chickens’ heads, faces, mouths, and noses. This localized, rapid wind-chill effect is more harmful than low temperatures alone: the chickens’ body surfaces and respiratory tracts are suddenly exposed to cold stress, and their immunity quickly declines. The issue is not that ventilation should be avoided, but that cold air must not blow directly onto the flock. Sudden cold drafts are the most common trigger of chilling and colds in flocks during cold snaps.
Once these three causes are understood, implementing a corresponding management plan can address both symptoms and root causes, rather than waiting until illness occurs before using medication.
Adjust humidity scientifically to repair the mucosal barrier. Choose a humidification method according to the poultry house conditions: a sealed poultry house can use a humidifier; for floor-reared chickens, sprinkle water on the floor at midday, when the temperature is relatively high. Avoid pouring large amounts of cold water, which can cause a sudden drop in poultry house temperature. Humidity should not be raised excessively without reason; maintain an appropriate range so the tracheal mucosa stays moist and the cilia move normally, protecting the first line of defense.
Prioritize warmth to maintain a steady temperature and reduce temperature fluctuations. Before a cold snap arrives, anticipate it and raise the baseline temperature inside the poultry house appropriately. Focus on reducing the difference between day and night temperatures. Avoid conditions that are hot during the day and cold at night, and reduce stress on the flock from alternating hot and cold. Keeping warm does not mean sealing the house completely. Many people seal poultry houses entirely to retain heat, allowing ammonia, carbon dioxide, and dust to build up inside. These can also damage the respiratory tract and may instead trigger more persistent respiratory problems.
Manage airflow carefully, prevent drafts, and ventilate scientifically. In windy weather, partially close and adjust the side windows and air inlets, and redirect airflow to keep cold air from blowing directly onto the chickens. Seal gaps in the walls and leaks around doorways to prevent drafts from getting in everywhere. Follow the principle of “low airflow for longer periods” when ventilating: prioritize replacing stale air without causing a sharp drop in the poultry house temperature, balancing the two essential needs of heat retention and ventilation.
In closing
Preventing disease in chickens has never been about relying on medication alone; it means understanding the relationship between the environment and the flock. In cold, windy weather, the core management approach is to prevent cold stress, keep mucous membranes moist, strictly control drafts, balance heat retention with ventilation, and strengthen the flock’s health in advance. Understand the three risk factors—cold, dryness, and wind—and attend to management details to reduce recurring respiratory problems. A stable flock is essential to safeguarding farming returns. The cold snap is expected to continue. Poultry farmers, inspect your houses more often, observe your flocks closely, and manage conditions carefully so your chickens can get through the winter safely!