Calf pneumonia – how to improve calf shed design to reduce disease risk

Calf pneumonia is a major health challenge in many dairy herds, often leading to costly treatments and reduced productivity. Advances in calf shed design offer ways to reduce the risk, especially through improved ventilation and weatherproofing.

Factors impacting calf health

Calf health is influenced by three main factors:

• The animal itself, through its immune system, colostrum management, and genetics
• The presence of pathogens which need to be managed
• The environment in which they are being reared.

Consider each factor when housing animals to significantly improve calf development.

Importance of effective calf housing

The gold standard for meeting the needs of young calves would be purpose-built housing, however that’s frequently an unrealistic goal.

The good news is, redesigning or retrofitting calf sheds can help dramatically improve the overall environment, reducing the threat of respiratory diseases.

Ventilation and environmental controls

Follow these three steps to reduce the incidence of calf pneumonia through ventilation control:

• Remove damp, stale air and replace with fresh, clean air
• Control air flow at the right volume and speed
• Minimise the degree of humidity that can create a breeding ground for pneumonia-causing pathogens

Tailored ventilation systems, such as Galebreaker’s VentTube Fresh, in calf sheds help ensure airborne pathogens are significantly reduced.

Assessing and controlling ventilation in calf housing

Be on the lookout for the following signs of poor ventilation:

• Ammonia odours
• Condensation
• Calves congregating in specific areas to avoid draughts or dampness.

The presence of these factors could indicate a building needs some improvement to reduce the risk of a calf pneumonia outbreak. Smoke bombs can help you assess how effectively air is circulating in the calf shed. A high performing building will clear smoke within a few minutes through vents and outlets. 

Installing a positive pressure tube system, such as Galebreaker’s VentTube Fresh, results in at least six air changes every hour in the winter and ensures air is equally dispersed to remove moisture, gases, airborne pathogens, and excess heat from livestock environments.

Take a look at this short video which was filmed at Buitelaar’s Trail Farm site and learn why VentTube Fresh was chosen.

Structural adjustments for wind and weather protection in calf sheds

To protect calves from harsh winter conditions, Galebreaker recommends solid walls up to 1.5 to 2 meters high to prevent draughts directly affecting calves. For adaptable and durable options, products like Galebreaker’s mesh screens or automated side curtains can be adjusted based on weather conditions such as temperature, wind speed, and direction, resulting in consistent weather protection.

Maintaining a draught-free zone for youngstock

While ensuring adequate air exchange in youngstock sheds, it’s vital to keep a draught-free zone. REMEMBER: ventilation should never be compromised by trying to minimise draughts. This could lead to excessive humidity above 85%, the ideal conditions for micro-organisms to thrive and cause disease.

Drainage and straw bedding management

Maintaining dry straw bedding through good drainage can help prevent cold stress and reduce pathogen load. Galebreaker recommends:

• A flooring slope of 1.6% for the overall building area
• A flooring slope of 5% in high moisture level areas such as around water troughs

Design and construction for calf comfort

If you are building brand new calf sheds, and have the option, consider the following steps to maximise ventilation efficiency and reduce disease risk:

·        Orientate buildings perpendicular to the prevailing wind

·        Use materials that are easy to keep clean, such as concrete, steel, and durable polymers

·        Install solid dividers between pens to help prevent disease transmission between calves

·       Adequate lighting helps regulate calf hormone balance, which aids in weight gain

Long-term herd health planning and herd management

Thoughtful planning and design of calf sheds can make a big contribution to long-term herd health and development, so don’t rush it. Farm visits are a good way to learn about other successful setups, as seeing good livestock housing first hand can offer valuable insights and prevent common and costly mistakes.  By focusing on good calf shed design, dairy farmers can significantly reduce the risk of calf pneumonia ensuring a healthier herd and more productive future.

If you have concerns about pneumonia risk in your youngstock, speak to our animal welfare team to set up an on-farm consultation. Call us on 01531 637900.