A San Anselmo-based group is placing owl boxes around the county to encourage rodent predation, as part of a move away from rodenticides. David Briggs

At the end of last year, Bolinas Bay Lumber & Landscaping Supplies decided to stop carrying DeCon and other chemical rodenticides. Instead they began offering pest management alternatives, and are trying to educate residents about their decision to quit stocking the poison.

“We realized that birds were eating the poisoned rats,” store owner Karen Dibblee said, “and . . .