To help a pet rabbit overcome fear, it is important to create a safe and comfortable environment for them. Avoid sudden loud noises or movements that could startle them. Spend time with your rabbit to build trust and bond with them. Gradually introduce new experiences or stimuli to help desensitize them to their fears. Provide plenty of hiding spots and enrichment activities to help them feel secure. Patience, consistency, and positive reinforcement are key in helping a rabbit overcome fear.