WILLMAR—When he looks at the herd of 100 Angus cows and their frisky spring calves grazing in a pasture of belly-high grass, Cullen Fischer still can’t believe his lifelong dream of raising cattle is coming true. “It’s kind of a pinch-me thing,” said the 31-year-old from Lake Lillian about his good fortune of taking over ownership of the well-established cow-calf operation from a retired farmer he met just a few years ago—a man who will continue to be his mentor. “I