Youngstock Rearing Effects of Housing

1
Youngstock Rearing Effects of Housing

• Bruce Richards BVSC MRCVS

2
Housing and Pneumonia

• Avoid moving after weaning stress
• Grouping too soon ? cross suckling
• Stocking density at 6 - 12 weeks
• - 1.5 to 2m2 Floor space
• - 8 to 9m3 Airspace
• Around 2.4m3 certain pneumonia
• Essentials - Ventilation
• - No draught (lt0.2m/s)
• - Dry, clean bed

3
Environment and Pneumonia

• Multifactorial low natural defences vs. high
  atmospheric load
• Natural defences - Antibodies (maternal
  active)
• - Nasal cavities
• - Cilia mucous
• - WBCs
• Atmospheric load No. particles in air (200 vs.
  4 million)
• Sources bedding, calf skin, exhaled air etc.
• Virus survival short - close contact
• - easily disinfected

4
(No Transcript)
5
Environment and Pneumonia - Control

• Warm, dry bedding chilling ?cilia immunity
• Drainage Humidity - more infection
• - ? survival in atmos. load
• - ammonia damage to cilia
• - 60 ? 80 10X ? AL
• Stocking density - bedding, faeces, calves
• - halve SD equiv 20X ? ventilation
• Avoid mixing airspace
• Vaccination

6
(No Transcript)