There will be a learning curve for your new employees, and they deserve to know how they're faring. Your feedback should be constructive and geared toward building a relationship with an employee who may need a bit more attention than you're used to providing. Rumors and innuendo. Immediately address rumors you hear. Solicit questions about what's going on.
Rumors are the poison of any organization.
They'll fester, distract your staff, and grow like a fungus. In Dilbertland, everyone is restricted to the four walls of their cubicles. Each person has access to only one management layer above them. Break through the ceiling and give your staff access to senior management. It's common for the digerati to know the CEO of the company they left.