In the first multimedia profile of the “Making a life in Addison County” series, Derrick Dykstra, 28, explains what motivates him to work long hours on his New Haven dairy farm. After high school, Dykstra worked construction in Pennsylvania before coming back a few years ago to the farm his family has operated for three generations. He is one of 7,000 adults between the ages of 20 and 34 in Addison County.