Albert De Vries

We have a renewed interest in the optimal dry period length for dairy cows. The average dry period length in the US is 57 days but variation exists. DHIA data say that on average, 13% of cows are dry less than 40 days and 26% are dry more than 70 days. The dry period allows the udder to go through a period of involution and ensures that the numbers of mammary cells continue to increase normally d ...