Common causes of high broiler mortality

High mortality usually needs an investigation rather than a single quick answer. This framework helps you examine the major risk areas systematically.

1. Infectious disease

Viral, bacterial, parasitic and other infectious problems can cause illness and death. The signs may overlap, so diagnosis should use flock history, examination and appropriate testing where available.

2. Water problems

Blocked or poorly functioning drinkers, inadequate availability, contamination and changes in water quality can affect flock health quickly. Check the system before looking for a complicated explanation.

3. Poor ventilation and heat stress

Temperature extremes, inadequate air exchange and poor litter or air quality can cause direct stress and increase vulnerability to disease. Observe bird distribution and house conditions together.

4. Feed and nutrition problems

Check feed availability, storage, quality, recent formulation changes and access to feeders. Keep batch information when investigating a possible feed-related issue.

5. Stocking and management pressure

Overcrowding, poor equipment distribution, inconsistent routines and weak monitoring can increase stress and make problems harder to detect early.

6. Biosecurity gaps

People, equipment, rodents, wild birds and movement between houses can introduce or spread pathogens. A practical biosecurity routine reduces avoidable exposure.

7. Delayed detection

Sometimes the underlying problem has been developing for days before mortality becomes obvious. Daily records of behaviour, feed, water, weights and mortality make earlier intervention possible.

A better response

Record the timeline, identify what changed, assess the whole flock and environment, and involve a qualified poultry veterinarian when mortality is significant, increasing or unexplained.