There is no clear causal relationship between providing information and changing behavior. Address the barriers to changing behavior. Getting involved is the first step to making a commitment, and making a commitment makes people more likely to act.
Small commitments lead to big ones.
Start by getting the shop owner involved in a visit. Then ask them to sign a form stating changes they will make. Feedback and follow-up are important. Feedback gives people cues about the impacts of their behavior changes. Additional contact is also very important in motivating people to stick with a task.