-control ammonia level by minimum ventilation as ammonia cause damage to respiratory system cilia and results in respiratory diseases like crd, e.coli, coryza etc.

-dry litter management as wet litter produce ammonia and mold growth and mold cause aspergillosis.

-focus on mycoplasma control.

-temperature should be optimum ,so keep brooders functional,

-water should be fresh having temperature between 18-21 C.

The best strategy for preventing respiratory issues in broilers during winter focuses on balanced ventilation and litter management to control air quality, while maintaining comfortable temperatures.<div>Here is a brief, prioritized strategy:</div><div>1. Controlled Minimum Ventilation (The Critical Step)</div><div> * The Goal: Exchange air to remove moisture, ammonia, and \text{CO}_2 without causing chilling drafts.</div><div> * Technique: Use small, timed, high-velocity fans (minimum ventilation fans) that draw in a limited amount of cold air.</div><div> * Air Mixing: Direct the cold incoming air along the ceiling so it mixes with the warm air layer before dropping to bird level, preventing a cold draft on the broilers.</div><div> * House Tightness: Ensure the house is well-sealed and insulated to create negative pressure, allowing you to control exactly where the fresh air enters (via controlled inlets, not random cracks).</div><div>2. Ammonia and Moisture Control</div><div> * Ammonia Monitoring: Routinely monitor ammonia levels (should be kept below \text{25 ppm}). High ammonia damages the broilers’ delicate respiratory cilia, making them susceptible to disease.</div><div> * Litter Management: Maintain dry, deep litter. Wet litter is the primary source of ammonia and a breeding ground for pathogens. Stirring or “caking out” wet spots is essential.</div><div> * Water System Maintenance: Prevent leaks from drinker lines, as wet litter under the drinkers drastically increases moisture and ammonia production.</div><div>3. Temperature & Humidity Balance</div><div> * Consistent Temperature: Maintain the set-point temperature (typically \text{20}^\circ\text{C} to \text{24}^\circ\text{C} for older broilers) to avoid cold stress, which weakens immunity.</div><div> * Humidity: Target a relative humidity between \text{50}% and \text{70}%. If humidity is too high (condensation on walls), increase the minimum ventilation rate.</div><div>4. Biosecurity and Supplements</div><div> * Biosecurity: Maintain strict hygiene to prevent the introduction of respiratory pathogens (e.g., Infectious Bronchitis or Mycoplasma).</div><div> * Support: Use specific vitamin and mineral supplements (like Vitamin C or herbal tonics) proactively to support the respiratory system and boost immunity against cold stress.</div>