Respiratory problems in poultry are among the most common and costly health challenges on Pakistani farms. Birds with breathing difficulty eat less, grow slower and lay fewer eggs, so early action protects both flock health and farm income. This guide covers the main causes, the signs to watch for, practical prevention steps and where supportive nutrition fits in.

Why respiratory problems are so common in Pakistan

Pakistan's climate puts constant pressure on a bird's airways. Hot, humid summers and cold, foggy winters mean sharp day and night temperature swings, and many houses are closed up in winter to keep birds warm. That traps ammonia, dust and moisture inside.

The risk usually rises from October to February. Farms that prepare ventilation and nutrition before the cold arrives tend to see fewer setbacks.

Common causes of respiratory problems in broilers and layers

Respiratory disease rarely has a single cause. It usually builds up from several pressures at once.

• Ammonia in the poultry house: wet litter releases ammonia, which irritates and damages the lining of the airways.
• Dust and poor air quality: feed dust, dry litter and dander carry irritants and microbes deep into the lungs.
• High humidity: damp air favours wet litter and microbial growth.
• Temperature swings: sudden chills stress birds and weaken their defences.
• Poor poultry ventilation: stale air lets gases and moisture build up.
• Overcrowding and stress: crowded birds are more exposed to each other's infections.
• Infectious agents: bacteria, viruses and fungi can all affect the respiratory tract. Only a veterinarian can confirm which one is involved.

For reference material on poultry respiratory diseases, see the Merck Veterinary Manual poultry section and Poultry Hub.

Poultry respiratory disease symptoms to watch for

Check your flock at least twice a day, ideally in the quiet early morning and at night when coughing and rattling are easiest to hear.

• Sneezing, coughing or rattling sounds
• Gasping, or stretching the neck to breathe
• Watery eyes, swollen face or nasal discharge
• Reduced feed intake and uneven growth
• Drop in egg production or poorer eggshell quality in layers
• Huddling, ruffled feathers and lethargy

Several of these signs overlap with other diseases, so do not rely on symptoms alone for a diagnosis.

How to prevent respiratory problems in your flock

Prevention is cheaper than recovery. Most of it comes down to controlling the environment.

1. Keep litter dry. Fix leaking drinkers, remove wet patches and top up fresh litter when needed.
2. Ventilate without chilling. Bring in fresh air and remove ammonia while avoiding cold drafts on young birds.
3. Control dust and stocking density. Stick to recommended bird numbers per square metre.
4. Hold temperature steady. Avoid large swings between day and night.
5. Follow biosecurity. Limit visitors, clean equipment and separate age groups.
6. Vaccinate on schedule. Use a programme designed with your veterinarian for the diseases in your area.
7. Supply clean water and balanced feed. Good nutrition supports normal immune function.

For international guidance on animal disease control, see the World Organisation for Animal Health (WOAH).

Supportive nutrition for respiratory health

Good management comes first, but supportive nutrition can help birds cope with seasonal stress. NB Sons offers several poultry and veterinary health supplements for this purpose.

• Sim ESS: formulated to support respiratory function in poultry, especially in Pakistan's humid and variable climate. Browse the full Easy Breathing collection for easy breathing support for broilers and layers.
• Simtonic: supports liver health and metabolism, which matters when birds are under stress.
• Selpro: vitamin E, selenium and vitamin C to support antioxidant protection and immune resilience.
• CeeZee: an antioxidant formulation that helps reduce oxidative stress across layers, broilers and breeders.

You can also explore the Immunity Boosters and Vitamins & Minerals collections. These products support flock health and are not a substitute for veterinary diagnosis or treatment.

When to consult a veterinarian

Call a veterinarian promptly if you notice any of the following:

• Respiratory signs in many birds at once or spreading quickly
• Sudden increase in mortality
• Marked drop in feed intake or egg production
• Signs that do not improve after correcting ventilation and litter

A vet can confirm the cause through examination and lab testing, and advise on the right treatment for your flock.

Frequently asked questions

What causes respiratory problems in poultry? Most cases come from a mix of poor air quality (ammonia, dust, humidity), temperature stress, weak ventilation and infectious agents.

When are respiratory problems most common in Pakistan? Risk usually rises in the cooler months, roughly October to February, when houses are closed and air quality drops.

How can I tell if my broilers have a respiratory problem? Listen for coughing, sneezing and rattling, and look for gasping, watery eyes, reduced feed intake and slower growth.

Can supplements prevent respiratory problems? No supplement replaces good management or veterinary care, but balanced nutrition and antioxidants can support overall flock resilience.

Conclusion

Respiratory problems in poultry are largely preventable with dry litter, good ventilation, stable temperatures and steady nutrition. Explore the full Veterinary Health collection, read more in the NB Sons Wellness Blog, or contact our team for product guidance.