If squirrels eat from a bird feeder, it will not attract many birds  However, squirrels eat from a bird feeder only if it lacks a protective cover
So a bird feeder will not attract many birds if it does not have a protective cover
If a tire's pressure is too low, the tire will wear out prematurely. But tire pressure will become too low if the car owner neglects to check the pressure regularly. Ttherefore, if the car owner neglects to check the pressure regularly, a tire will wear out prematurely.