Why do broilers suddenly start dying?

Sudden mortality is a signal, not a diagnosis. Before choosing a treatment, structure the investigation so you do not miss an environmental, management, nutritional or infectious problem.

1. Check the timeline

Write down when the first deaths were noticed, the number of dead birds, whether mortality is increasing, and the age of the flock. Compare the timing with recent changes such as vaccination, feed changes, movement, weather, stocking density or new birds.

2. Look at the whole flock

Do not inspect only dead birds. Observe activity, feed and water consumption, droppings, breathing, posture, distribution around the house and whether birds are clustering around drinkers or heat sources.

3. Check water first

Water problems can affect an entire flock quickly. Inspect drinker function, water availability, cleanliness, pressure or height where applicable, leaks and any recent change in the water source. Compare today's water consumption with the farm's normal record.

4. Check feed and feeding behaviour

Confirm that birds can reach feed and that feed is available as expected. Note recent feed changes, unusual smell or appearance, storage problems, wet feed and changes in consumption. Keep the feed label and batch information when investigating a possible feed-related issue.

5. Check the environment

Review ventilation, temperature, humidity, ammonia, litter condition, stocking density and power interruptions. Heat stress, poor ventilation and other environmental problems can create rapid flock deterioration or make disease problems worse.

6. Review records and recent events

Pull together vaccination records, medications, mortality, feed and water intake, weights, temperature readings and previous health problems. Patterns often become visible when the information is viewed together.

7. Avoid treating the symptom blindly

Several poultry diseases and non-infectious problems can produce overlapping signs. A treatment that is appropriate for one cause may be ineffective or inappropriate for another. Where possible, diagnosis should be supported by flock history, examination and appropriate laboratory investigation.

Turn the investigation into a system

The goal is not simply to react faster. It is to build a repeatable way of observing risk, preventing avoidable problems, responding intelligently and improving farm performance.