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Nicasio Valley Cheese Company’s head cheesemaker, Bryan Ackerly, broke up curds while making Loma Alta on Tuesday. The company’s Foggy Morning won a Best of Division award at this year’s state fair. David Briggs

Seana Doughty has a case of O.C.D.: “obsessive cheesemaker disorder.”

With a self-described “extreme nerdiness” in her scientific approach and a bit of creative flair, she operates Bleating Heart, a micro-creamery in Tomales that churns milk from 100 sheep and 10 cows on Marissa Thornton’s ranch into some of the world’s top cheeses.

Approaching . . .