Growing Forward 2 - Final Report - Page 11

DAIRY CATTLE More than 4,000 dairy farms in Ontario produce over $1.8 billion worth of milk annually, and considering all farm gate receipts, dairy is the largest economic sector of Ontario agriculture.1 Average dairy herd sizes have become larger and average milk production per cow has increased, with 270,000 cows producing 2.5 billion litres of milk per year. Modern dairy herd management, with confined free-stall housing and automated robotic milking systems, has created new challenges in herd health management, as cows are housed at higher densities and are placed under greater metabolic stres