CHANGING LANDSCAPE: Population growth in Los Angeles County forced dairy farmers to migrate to San Bernardino and Riverside counties about 50 years ago. Now the dairies are being relocated again. Above, a dairy in Ontario. (Don Kelsen / LAT)
DAIRY FARMER: Marty Van Leeuwen is carrying on his familys tradition. He has a herd of 950 milking cows. (Don Kelsen / LAT)
MILK PRODUCER: Cow 1791 wraps up one of her twice-a-day visits to a milking machine at the Manna Dairy in Ontario. (Don Kelsen / LAT)
ENCROACHMENT: Homeowners on the south sideÖ of Ontarios Tumbleweed Street can look over their back walls and see dairies on the other side of Schaefer Avenue. (Don Kelsen / LAT)
