section_path: Nutrition and health/Cow's milk: variation by breed
section_name: Cow's milk: variation by breed
paragraph_text: Cow's milk: variation by breed
  
  These compositions vary by breed, animal, and point in the lactation period.
  
  The protein range for these four breeds is 3.3% to 3.9%, while the lactose range is 4.7% to 4.9%.
  
  Milk fat percentages may be manipulated by dairy farmers' stock diet formulation strategies. The infection known as mastitis, especially in dairy cattle, can cause fat levels to decline.