If this is not handle in a professional manner between the two employees---then the manager/owner is needed to resolve the issue.
Some act in such an unprofessional manner I am embarrassed for them and I always wonder why these adult employees are not more professional.
If there is an issue---then the new hire should be advised to contact the manager/owner---whoever is in charge to take care of the issue in a professional manner.
A Smile---Has Become Dormant in Businesses---Today
Workplace Where Professional Attitude and Excellent Behavior Prevails
Women/Men should Always Dress for Success