How loose the fertilizer is depends on the type of feed, amount of grain in the ration, and how green the grass in the spring is. Now think about it regarding the pregnancy ... since bovine cows can have ONE calf a year and the cow has to have a calf in order to produce milk, she has to be pregnant almost year round. Dairy cows are milked for 305 days per year, then dried off for the end of pregnancy and preparation for delivery of the calf and new milk production for the next year. Today's dairy cows' dates are made via computer and semen is sent to the dairy then a Vet. / inseminator inseminates the cow. The dairy cow never sees the bull much less has a romantic meeting. Range beef cows are fast catching up to the on line dating scene.No Mary, dairy are more loose...... Think about it, they are either pregnant or thinking about being pregnant.....& with almost any bull!